(13) باب الصَّدَاقِ وَجَوَازِ كَوْنِهِ تَعْلِيمَ قُرْآنٍ وَخَاتَمَ حَدِيدٍ وَغَيْرَ ذَلِكَ مِنْ قَلِيلٍ وَكَثِيرٍ وَاسْتِحْبَابِ كَوْنِهِ خَمْسَمِائَةِ دِرْهَمٍ لِمَنْ لاَ يُجْحَفُ بِهِ
Abd al-Rahman b. 'Auf (Allah be pleased with him) reported that Allah's Messenger (ﷺ) saw the signs of the happiness of wedding in me, and I said:
I have married a woman of the Ansar. He said: How much Mahr have you paid? I said: For a date-stone weight of gold. And in the hadith transmitted by Ishaq (it is): (nawat weight) of gold.
Reference: Sahih Muslim 1427 e
In-book reference: Book 16, Hadith 96
USC-MSA web (English) reference(deprecated numbering scheme): Book 8, Hadith 3323