أَخْبَرَنَا يَعْقُوبُ بْنُ إِبْرَاهِيمَ، قَالَ حَدَّثَنَا يَحْيَى، عَنْ هِشَامٍ، قَالَ وَحَدَّثَنِي أَبِي، عَنْ حَجَّاجِ بْنِ حَجَّاجٍ، عَنْ أَبِيهِ، قَالَ قُلْتُ يَا رَسُولَ اللَّهِ مَا يُذْهِبُ عَنِّي مَذَمَّةَ الرَّضَاعِ قَالَ ‏"‏ غُرَّةُ عَبْدٍ أَوْ أَمَةٍ ‏"‏ ‏.‏

It was narrated from Hajjaj bin Hajjaj that his father said: "I said: 'O Messenger of Allah, how can I pay back the dues of the one who breast-fed me?' He said: 'By giving a male or female slave.'" Translation Not Available

Book Ref: Sunan An Nisai Book 26 Hadith 3329
Web Ref:  Sunan An Nisai Vol 4 Book 26 Hadith 3331