When ʿAbdur-Rahman bin ʿAuf married an Ansari woman, the Prophet ﷺ asked him, "How much Mahr did you give her?" ʿAbdur-Rahman said, "Gold equal to the weight of a date stone." Anas added: When they (i.e. the Prophet ﷺ and his companions) arrived at Medina, the emigrants stayed at the Ansar's houses. ʿAbdur-Rahman bin ʿAuf stayed at Saʿd bin Ar-Rabi's house. Saʿd said to ʿAbdur- Rahman, "I will divide and share my property with you and will give one of my two wives to you." ʿAbdur-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 ʿAbdur-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."  

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  

The Prophet ﷺ did not give a better wedding banquet on the occasion of marrying any of his wives than the one he gave on marrying Zainab, and that banquet was with (consisted of) one sheep.  

مَا أَوْلَمَ النَّبِيُّ ﷺ عَلَى شَىْءٍ مِنْ نِسَائِهِ مَا أَوْلَمَ عَلَى زَيْنَبَ أَوْلَمَ بِشَاةٍ  

Messenger of Allah ﷺ manumitted Safiyya and then married her, and her Mahr was her manumission, and he gave a wedding banquet with Hais (a sort of sweet dish made from butter, cheese and dates).  

أَنَّ رَسُولَ اللَّهِ ﷺ أَعْتَقَ صَفِيَّةَ وَتَزَوَّجَهَا وَجَعَلَ عِتْقَهَا صَدَاقَهَا وَأَوْلَمَ عَلَيْهَا بِحَيْسٍ  

The Prophet ﷺ consummated his marriage with a woman (Zainab), so he sent me to invite men to the meals.  

سَمِعْتُ أَنَسًا يَقُولُ بَنَى النَّبِيُّ ﷺ بِامْرَأَةٍ فَأَرْسَلَنِي فَدَعَوْتُ رِجَالاً إِلَى الطَّعَامِ