"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.'" (Using translation from Nasāʾī 3329)   

أَنَّهُ قَالَ يَا رَسُولَ اللَّهِ مَا يُذْهِبُ عَنِّي مَذَمَّةَ الرَّضَاعِ قَالَ «الْغُرَّةُ الْعَبْدُ أَوِ الْأَمَةُ»