Language:
كتاب النكاح
67
Wedlock, Marriage (Nikaah)
(57)
Chapter: How to invoke good upon a person who has married recently?
(56)
باب كَيْفَ يُدْعَى لِلْمُتَزَوِّجِ

Narrated Anas:

The Prophet (ﷺ) saw the traces of Sufra (yellow perfume) on `Abdur-Rahman bin `Auf and said, "What is this?" `Abdur-Rahman, said, "I have married a woman and have paid gold equal to the weight of a datestone (as her Mahr). The Prophet (ﷺ) said to him, "May Allah bless you: Offer a wedding banquet even with one sheep."

حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، حَدَّثَنَا حَمَّادٌ ـ هُوَ ابْنُ زَيْدٍ ـ عَنْ ثَابِتٍ، عَنْ أَنَسٍ ـ رضى الله عنه ـ أَنَّ النَّبِيَّ صلى الله عليه وسلم رَأَى عَلَى عَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ أَثَرَ صُفْرَةٍ قَالَ ‏"‏ مَا هَذَا ‏"‏‏.‏ قَالَ إِنِّي تَزَوَّجْتُ امْرَأَةً عَلَى وَزْنِ نَوَاةٍ مِنْ ذَهَبٍ‏.‏ قَالَ ‏"‏ بَارَكَ اللَّهُ لَكَ، أَوْلِمْ وَلَوْ بِشَاةٍ ‏"‏‏.‏
Reference : Sahih al-Bukhari 5155
In-book reference : Book 67, Hadith 90
USC-MSA web (English) reference : Vol. 7, Book 62, Hadith 85
  (deprecated numbering scheme)