Fadalah bin Abi Umayyah narrates from his father: Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) made a kitabah contract with me, then asked Sayyidah Hafsah (may Allah be pleased with her) for two hundred to give, and helped him with it. The narrator says: I mentioned this to Ikrimah, and he recited this saying of Allah: "And give them from the wealth of Allah which He has given you" [Surah al-Nur: 33].
Hadith Referenceالسنن الكبرى للبيهقي / كتاب المكاتب / 21672