Language:
كتاب الأحكام
93  
Judgments (Ahkaam)
(44)
Chapter: Whosoever gave the Bai'a twice
(44)
باب مَنْ بَايَعَ مَرَّتَيْنِ
Sahih al-Bukhari 7208

Narrated Salama:

We gave the oath of allegiance to the Prophet (ﷺ) under the tree. He said to me, "O Salama! Will you not give the oath of allegiance?" I replied, "O Allah's Messenger (ﷺ)! I have already given the oath of allegiance for the first time." He said, (Give it again) for the second time.

حَدَّثَنَا أَبُو عَاصِمٍ، عَنْ يَزِيدَ بْنِ أَبِي عُبَيْدٍ، عَنْ سَلَمَةَ، قَالَ بَايَعْنَا النَّبِيَّ صلى الله عليه وسلم تَحْتَ الشَّجَرَةِ فَقَالَ لِي ‏"‏ يَا سَلَمَةُ أَلاَ تُبَايِعُ ‏"‏‏.‏ قُلْتُ يَا رَسُولَ اللَّهِ قَدْ بَايَعْتُ فِي الأَوَّلِ‏.‏ قَالَ ‏"‏ وَفِي الثَّانِي ‏"‏‏.‏
Reference : Sahih al-Bukhari 7208
In-book reference : Book 93, Hadith 68
USC-MSA web (English) reference : Vol. 9, Book 89, Hadith 315
  (deprecated numbering scheme)