(23) باب الْحَجِّ عَمَّنْ لاَ يَسْتَطِيعُ الثُّبُوتَ عَلَى الرَّاحِلَةِ
Narrated Ibn `Abbas:
A woman from the tribe of Khath'am came in the year (of ,Hajjat-al-Wada` of the Prophet (ﷺ) ) and said, "O Allah's Messenger (ﷺ)! My father has come under Allah's obligation of performing Hajj but he is a very old man and cannot sit properly on his Mount. Will the obligation be fulfilled if I perform Hajj on his behalf?" The Prophet (ﷺ) replied in the affirmative.
Reference: Sahih al-Bukhari 1853
In-book reference: Book 28, Hadith 33
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 29, Hadith 78