Sunan Ibn Majah, Book 22, Hadith 2801 (In-Book) ⓘ
It was narrated that Anas bin Malik said: “What the Messenger of Allah most enjoined when he was dying and breathing his last was: The prayer; and those whom your right hands possess.”
حَدَّثَنَا أَحْمَدُ بْنُ الْمِقْدَامِ، حَدَّثَنَا الْمُعْتَمِرُ بْنُ سُلَيْمَانَ، سَمِعْتُ أَبِي يُحَدِّثُ، عَنْ قَتَادَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ كَانَتْ عَامَّةُ وَصِيَّةِ رَسُولِ اللَّهِ صلى الله عليه وسلم حِينَ حَضَرَتْهُ الْوَفَاةُ وَهُوَ يُغَرْغِرُ بِنَفْسِهِ " الصَّلاَةَ وَمَا مَلَكَتْ أَيْمَانُكُمْ " .
also referenced under: Hadith 2697 (Reference) & Volume 3, Book 22, Hadith 2697 (DarusSalam)