حَدَّثَنَا مُحَمَّدُ بْنُ فُضَيْلٍ حَدَّثَنَا الْمُغِيرَةُ عَنْ أُمِّ مُوسَى عَنْ عَلِيٍّ رَضِيَ اللَّهُ عَنْهُ قَالَ كَانَ آخِرُ كَلَامِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ الصَّلَاةَ الصَّلَاةَ اتَّقُوا اللَّهَ فِيمَا مَلَكَتْ أَيْمَانُكُمْ
مسند امام احمد بن حنبل · Hadith 585
It was narrated from 'Ali (RA) that he said: "The last words of the Messenger of Allah (PBUH) were: "Prayer, prayer! And fear Allah with regard to what your right hands possess [i.e., female slaves]."
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020