Narrated Anas:

When 'Abdur-Rahman bin 'Auf married an Ansari woman, the Prophet asked him, "How much Mahr did you give her?" 'Abdur-Rahman said, "Gold equal to the weight of a date stone." Anas added: When they (i.e. the Prophet and his companions) arrived at Medina, the emigrants stayed at the Ansar's houses. 'Abdur-Rahman bin 'Auf stayed at Sad bin Ar-Rabi's house. Sad said to 'Abdur-Rahman, "I will divide and share my property with you and will give one of my two wives to you." 'Abdur-Rahman said, "May Allah bless you, your wives and property (I am not in need of that;
but kindly show me the way to the market)." So 'Abdur-Rahman went to the market and traded there gaining a profit of some dried yoghurt and butter, and married (an Ansari woman). The Prophet ﷺ said to him, "Give a banquet, even if with one sheep."

حَدَّثَنَا عَلِيٌّ، حَدَّثَنَا سُفْيَانُ، قَالَ حَدَّثَنِي حُمَيْدٌ، أَنَّهُ سَمِعَ أَنَسًا ـ رضى الله عنه ـ قَالَ سَأَلَ النَّبِيُّ ﷺ عَبْدَ الرَّحْمَنِ بْنَ عَوْفٍ وَتَزَوَّجَ امْرَأَةً مِنَ الأَنْصَارِ " كَمْ أَصْدَقْتَهَا ". قَالَ وَزْنَ نَوَاةٍ مِنْ ذَهَبٍ. وَعَنْ حُمَيْدٍ سَمِعْتُ أَنَسًا قَالَ لَمَّا قَدِمُوا الْمَدِينَةَ نَزَلَ الْمُهَاجِرُونَ عَلَى الأَنْصَارِ فَنَزَلَ عَبْدُ الرَّحْمَنِ بْنُ عَوْفٍ عَلَى سَعْدِ بْنِ الرَّبِيعِ فَقَالَ أُقَاسِمُكَ مَالِي وَأَنْزِلُ لَكَ عَنْ إِحْدَى امْرَأَتَىَّ. قَالَ بَارَكَ اللَّهُ لَكَ فِي أَهْلِكَ وَمَالِكَ. فَخَرَجَ إِلَى السُّوقِ فَبَاعَ وَاشْتَرَى فَأَصَابَ شَيْئًا مِنْ أَقِطٍ وَسَمْنٍ فَتَزَوَّجَ فَقَالَ النَّبِيُّ ﷺ " أَوْلِمْ وَلَوْ بِشَاةٍ ".