وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّهُ كَانَ يُكَفِّرُ عَنْ يَمِينِهِ، بِإِطْعَامِ عَشَرَةِ مَسَاكِينَ لِكُلِّ مِسْكِينٍ مُدٌّ مِنْ حِنْطَةٍ وَكَانَ يَعْتِقُ الْمِرَارَ إِذَا وَكَّدَ الْيَمِينَ ‏.‏

Yahya related to me from Malik from Nafi that Abdullah ibn Umarused to do kaffara for a broken oath by feeding ten poor people. Eachperson got a mudd of wheat. He sometimes freed a slave if he hadrepeated the oath. Translation Not Available

Book Ref: Muwatta Imam Malik Book 22 Hadith 1025
Web Ref:  Muwatta Imam Malik Book 22 Hadith 13