It is narrated from Anas bin Malik (may Allah be pleased with him) that Abdur Rahman bin Awf (may Allah be pleased with him) came to the Prophet (ﷺ) and there was a yellow mark on his (clothes or body). The Messenger of Allah (ﷺ) inquired about it, and he informed him that he had married a woman from among the Ansar. Upon this, the Messenger of Allah (ﷺ) said: "How much dowry did you give?" He replied: "I gave gold equal to the weight of a date stone." Then the Messenger of Allah (ﷺ) said to him: "Give a wedding feast, even if it is with only one goat."
Hadith Referenceمسند الإمام الشافعي / كتاب النكاح / 1115
Hadith Takhrijاخرجه البخاري النكاح، باب الصفرة للمتزوج (5153)۔