On the authority of Abu Dharr (radiAllahu anhu), that the Prophet (sallAllahu alayhi wasallam) said –
“Whoever says ten times immediately after finishing the Fajr (Dawn) Payer, before moving from his place or talking to anyone,
“laa ilaaha illallaahu wahdahu laa shareeka lahu, lahul mulku wa lahul hamdu yuhyee wa yumeetu wa huwa alaa kulli shay’in qadeer – [ none has the right to be worshipped except Allaah alone having no partner, sovereignty is His and all praise is for Him and He brings life and He causes death and He has full power over everything,]”
ten good deeds will be recorded for him, ten sins will be eliminated from him, he will be upgraded ten degrees (in reward), he will be safeguarded from all kinds of harm all that day, he will be guarded against shaytan and no sin can overtake him on that day (and nullify his good deeds) except associating others in worship with Allaah. (At Tirmidhi no.3484 [5/515])
At-Tirmidhi commented on this hadeeth saying, “This is a hasan, saheeh hadeeth (i.e a good and authentic hadeeth)”.
Likewise it is an act of Sunnah to say dhikr ten times straight after Magrib salah too, according to a hadith related by Imaam Ahmad Hanbal (rahimahullah) on the authority of Umm Salamah (radiAllahu anha), hadith number 26430. Also stated in Sahih Ibn Hibban no. 2023.
Source : A Summary of Islamic Jurisprudence – Dr. Salih al-Fawzaan, Volume 1 , Chapter 10
The Virtues of Fasting ‘Ashura (10th of Muharram)
The Prophet, peace be upon him, said:
“For fasting the day of ‘Ashura, I hope that Allah will accept it as expiation for the year that went before.” [Reported by Muslim, 1976]
Ibn ‘Abbas, may Allah be pleased with them both, said:
“I never saw the Messenger of Allah, upon whom be peace, so keen to fast any day and give it priority over any other than this day, the day of ‘Ashura, and this month, meaning Ramadhan.” [Reported by al-Bukhari, 1867]
‘Abdullah ibn ‘Abbas, may Allah be pleased with them both, said:
“When the Messenger of Allah, peace be upon him, fasted on ‘Ashura and commanded the Muslims to fast as well, they said, ‘O Messenger of Allah, it is a day that is venerated by the Jews and Christians.’ The Messenger of Allah, peace be upon him, said:
‘If I live to see the next year, insha’Allah, we will fast on the ninth day too.’
But it so happened that the Messenger of Allah, peace be upon him, passed away before the next year came.” [Reported by Muslim, 1916]
[Translated by Aboo Talhah Daawood ibn Ronald Burbank]
Source : www.alitisaambissunnah.wordpress.com
At-Tirmidhee reported in his ‘Sunan’ [Kitaab Tafseeril-Qur.aan: Chapter (39): And from Soorah ‘Saad’ (no. 3233)]:
“Salamah ibn Shabeeb narrated to us, and `Abd ibn Humayd, both saying: `Abdur Razzaaq narrated to us: from Ma`mar: from Ayyoob: from Aboo Qilaabah: from Ibn `Abbaas who said: Allaah’s Messenger said:
<< Last night my Lord -the Exalted and Most High- came to me in the finest form >>
he said: I think he said: << in a dream >>,
<< so He said: ‘O Muhammad! Do you know what the highest company (of Angels) are disputing about?.’
He said: “I said: No.”
He said: So He placed His Hand between my shoulder-blades, so that I felt its coolness within my breast – or he said – my chest. So I knew what was in the heavens and upon the earth.
He said: ‘O Muhammad! Do you know what the highest company (of Angels) are disputing about?’
I said: Yes, about those things which efface sins; and those things which efface sins are:
Remaining in the mosques after the Prayer, and walking upon foot to the congregational Prayers, and perfecting the wudoo when it is difficult.
Whoever does that will live upon good and die upon good, and with regard to his sins he will be like the day his mother gave birth to him.”
He said ‘O Muhammad! When you pray then say:
Allaahumma innee as aluka fi’alal khayraathi, wa tarkil munkaraati, wa hubbaal masaakeeni, wa idhaa ardatha bi ibaadika fitnatan faqbidhnee ilayka ghayra maftoon
O Allaah, I ask You for the performance of good deeds, and the abandonment of evil deeds, and for love of the poor and needy; and if You wish to put Your servants to trial then take me to Yourself (in death) not being put to trial.’
And the (high) levels are propagating the greeting of ‘Salaam’, providing food, and praying during the night whilst the people are sleeping. >>“
[Shaikh al-Albaanee said: ‘Saheeh’ ]
Anas bin Maalik (radhi Allaahu anhu) said: Verily the Prophet (salla Allahu alaihi wa sallam) said:
Whoever sends Salah upon me once Allah will send ten upon him and remove ten of his sins and raise his rank by ten levels.
Imam Ahmad in his Musnad
Imam Bukharee in Adabul Mufrad #642 and #643.
Jami Sagheer #6359 authenticated by Al Abaanee
Source for above image: Al- Adab al-Mufrad , published by UK Islamic Academy
Abu Muhammad Ka`b bin `Ujrah (May Allah be pleased with him) reported: The Prophet (sallallaahu ’alayhi wa sallam) came to us and we asked him, “O Messenger of Allah, we already know how to greet you (i.e., say As-salamu `alaikum), but how should we supplicate for you?” He (sallallaahu ’alayhi wa sallam) said,
“Say: `Allahumma salli `ala Muhammadin, wa `ala `ali Muhammadin, kama sallaita `ala `ali Ibrahima, innaka Hamidum Majid. Allahumma barik `ala Muhammadin, wa `ala `ali Muhammadin, kama barakta `ala `ali Ibrahima, innaka Hamidum Majid
[O Allah, exalt the mention of Muhammad and the family of Muhammad as you exalted the family of Ibrahim. You are Praised and Glorious. O Allah, bless Muhammad and the family of Muhammad as You blessed the family of Ibrahim. You are Praised and Glorious.”’
[Al-Bukhari and Muslim].
Sa’d b. Abu Waqqas reported: The Messenger of Allah (may peace be upon him) said: If anyone says on hearing the Mu’adhdhin:
وَأَنا أَشْـهَدُ أَنْ لا إِلـهَ إِلاّ اللهُ وَحْـدَهُ لا شَـريكَ لَـه ، وَأَنَّ محَمّـداً عَبْـدُهُ وَرَسـولُه ، رَضيـتُ بِاللهِ رَبَّاً ، وَبِمُحَمَّـدٍ رَسـولاً وَبِالإِسْلامِ دينَـاً .
Wa ‘anaa ashhadu an laa ilaaha illal-laahu wahdahu laa shareeka lahu, wa ‘anna Muhammadan ‘abduhu wa Rasooluhu, radheetu billaahi Rabban, wa bi Muhammadin Rasoolan wabil-islami deenan.
‘I bear witness that none has the right to be worshipped but Allaah alone, Who has no partner, and that Muhammad is His Slave and His Messenger. I am pleased with Allah as my Lord, with Muhammad as my Messenger and with Islam as my religion.’
his sins would be forgiven 
[To be recited in Arabic after the Mu’aththin’s Tashahhud or the words of affirmation of faith]
 Muslim 1/290
 Ibn Khuzayma 1/220
whoever wears a garment and says:
الحمدُ للهِ الّذي كَساني هذا (الثّوب) وَرَزَقَنيه مِنْ غَـيـْرِ حَولٍ مِنّي وَلا قـوّة .
Al-Hamdu lillaahil-ladhee kasaanee haadha (at-thawb) wa Razaqaneeh min ghayri hawlin minnee wa laa quwwatin
Praise be to Allah who has clothed me with this (garment) and provided it for me without any strength or power on my part
is forgiven his past and future sins.
[‘Sahih al-Jami’ #6086]
[Al-Bukhari, Muslim, Abu Dawud, Ibn Maajah, At-Tirmidhi.]
See also Irwa’ul-Ghaleel 7/47]
“Whoever ate something, then said: الْحَمْـدُ للهِ الَّذي أَطْعَمَنـي هـذا وَرَزَقَنـيهِ مِنْ غَـيْرِ حَوْلٍ مِنِّي وَلا قُوَّة
Al-Hamdu lillaahilladhee at’amanee hadha wa razaqneeh min ghayri hawlin minnee wa la quwwa
‘Praise be to Allah who has fed me this food and provided it for me, without any strength or power on my part’
is forgiven his past and future sins.
[‘Sahih al-Jami’ #6086]