Safinah said: I was a slave of Umm Salamah, and she said: I shall emancipate you, but I stipulate that you must serve the Messenger of Allah ﷺ as long as you live. I said: Even if you do not make a stipulation, I shall not leave the Messenger of Allah ﷺ. She then emancipated me and made the stipulation with me.  

أَنْ تَخْدُمَ رَسُولَ اللَّهِ ﷺ مَا عِشْتَ فَقُلْتُ إِنْ لَمْ تَشْتَرِطِي عَلَىَّ مَا فَارَقْتُ رَسُولَ اللَّهِ ﷺ مَا عِشْتُ فَأَعْتَقَتْنِي وَاشْتَرَطَتْ عَلَىَّ  

[Machine] "To me, Umm Salamah, I set you free and I stipulate that you serve the Messenger of Allah ﷺ for as long as you live." I said, "If you hadn't stipulated on me, I wouldn't have left the service of the Messenger of Allah ﷺ as long as I live." He said, "So, she freed me and stipulated on me to serve the Messenger of Allah ﷺ for as long as I live."  

لِي أُمُّ سَلَمَةَ أُعْتِقُكَ وَأَشْتَرِطُ عَلَيْكَ أَنْ تَخْدُمَ رَسُولَ اللَّهِ ﷺ مَا عِشْتَ قَالَ قُلْتُ «لَوْ أَنَّكِ لَمْ تَشْتَرِطِي عَلَيَّ مَا فَارَقْتُ رَسُولَ اللَّهِ ﷺ مَا عِشْتُ» قَالَ «فَأَعْتَقَتْنِي وَاشْتَرَطَتْ عَلَيَّ أَنْ أَخْدُمَ رَسُولَ اللَّهِ ﷺ مَا عِشْتُ»  

Safinah said: I was a slave of Umm Salamah, and she said: I shall emancipate you, but I stipulate that you must serve the Messenger of Allah ﷺ as long as you live. I said: Even if you do not make a stipulation, I shall not leave the Messenger of Allah ﷺ. She then emancipated me and made the stipulation with me. (Using translation from Abū Dāʾūd 3932)  

أَنْ تَخْدُمَ النَّبِيَّ ﷺ مَا عِشْتَ فَقُلْتُ إِنْ لَمْ تَشْتَرِطِي عَلَيَّ مَا فَارَقْتُ النَّبِيَّ ﷺ مَا عِشْتُ فَأَعْتَقَتْنِي وَاشْتَرَطَتْ عَلَيَّ