When the Prophet ﷺ congratulated a man on his marriage, he said: May Allah bless for you, and may He bless on you, and combine both of you in good (works). (Using translation from Abū Dāʾūd 2130)   

كَانَ رَسُولُ اللهِ ﷺ إِذَا رَفَّأَ رَجُلًا قَالَ «بَارَكَ اللهُ فِيكَ وَبَارَكَ عَلَيْكَ وَجَمْعَ بَيْنَكُمَا فِي خَيْرٍ»  

The Prophet ﷺ saw the traces of Sufra (yellow perfume) on ʿAbdur-Rahman bin ʿAuf and said, "What is this?" ʿAbdur-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." (Using translation from Bukhārī 5155)  

أَنَّ رَسُولَ اللهِ ﷺ رَأَى عَلَى عَبْدِ الرَّحْمَنِ أَثَرَ صُفْرَةٍ فَقَالَ «مَا هَذَا؟» قَالَ تَزَوَّجْتُ امْرَأَةً عَلَى وَزْنِ نَوَاةٍ مِنْ ذَهَبٍ قَالَ «بَارَكَ اللهُ لَكَ أَوْلِمْ وَلَوْ بِشَاةٍ»  

"The Messenger of Allah saw a trace of yellow perfume on me" -as if he meant 'Abdur-Rahman bin 'Awf- "and said: 'What's this for?' He said: 'I have married a woman from among the Ansar.' He said: 'Give a Walimah (wedding feast) even if it is with one sheep.'" (Using translation from Nasāʾī 3374)   

أَنَّ عَبْدَ الرَّحْمَنِ بْنَ عَوْفٍ تَزَوَّجَ امْرَأَةً مِنَ الْأَنْصَارِ فَلَقِيَهُ رَسُولُ اللهِ ﷺ فَقَالَ «مَهْيَمْ؟» قَالَ تَزَوَّجْتُ امْرَأَةً فَقَالَ «أَوْلِمْ وَلَوْ بِشَاةٍ»  

"Aqil bin Abi Talib married a woman from Banu Jusham, and it was said to him: 'May you live in harmony and have many sons.' He said: 'Say what the Messenger of Allah said: Barak Allahu fikum, wa baraka lakum. (May Allah bless you and bestow blessings upon you.)'" (Using translation from Nasāʾī 3371)  

قَالَ رَسُولُ اللهِ ﷺ «بَارَكَ اللهُ فِيكُمْ وَبَارَكَ لَكُمْ»