The Prophet صلى الله عليه و آله وسلم said:

“As for you leaving your homes aiming for the Bait-ul-Haraam:  then your she-camel does not place its foot nor does it raise it except that Allaah writes for you a reward due to it, and wipes off one of your sins.

As for the two Rakah after the Tawaaf, then it is equivalent to freeing a slave from the Children of Ismaeel.

As for your circuiting of as-Safa and al-Marwa, then it is the same as freeing 70 slaves.

As for you staying till the evening in Arafah, then Allaah descends to the sky of the Duniya and He boasts about you to the Angels, and says:  ‘My slaves have come to Me, looking rough, from every deep valley hoping for My mercy, so if your sins were equivalent to the amount of sand or the drops of rain or like the foam on the sea I will forgive them.  So go forth My slaves!  Having forgiveness and for what or who you have interceded for.’

As for stoning the Jamaar (the pillars), then for every stone that you throw, it removes a big sin from the deadly sins.

As for your slaughtering, then it is saved for you with your Lord.

As for shaving your head, then there is a reward for every strand of hair that you shaved, and a sin is wiped off by it.

As for you performing Tawaaf of the House after all this, then by this time your are performing Tawaaf with no sin upon you and an Angel comes and places his hand between your shoulders saying: “Perform good deeds in what you face of the future for verily your past sins have been forgiven.”

Reported by at-Tabarani in his book “al-Kabeer” and by al-Bazaar. Shaykh Al-Albani graded it  Hassan.  Taken from ‘Saheeh al-Targheeb wa Tarheeb’.  Volume 2, Page 9-10, hadeeth no. 1112

Posted from : Ahadith regarding the benefits and blessings of Hajj – Saheeh al-Targheeb wa Tarheeb, By the Shaykh, ‘Allaama, the Muhadith Muhammad Nasr ud-Deen al-Albaani
Translated by Abbas Abu Yahya 

18. And he continually repeats the talbiyyah as it is “from the signs of Hajj”(25) and because of the Prophet’s saying:

“There is no one who makes talbiyyah except that whatever is on his right and left – trees and stones also make talbiyyah until the earth resounds from here and here – meaning – on his right and left.”(26)

Especially whenever he ascends a high place or descends a valley – according to the hadith which has preceded: “It is as if I am looking at Musa – upon whom be peace – coming down from the mountain pass….loudly reciting talbiyyah” and in the other hadith: “It is if I am looking towards him when he descends in the valley reciting talbiyyah”.

https://abdurrahman.org/2014/01/23/riteshajjumrahalbani/