Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: Most of the final instructions of the Prophet (peace and blessings be upon him) were: "(Take care of) the prayer and those under your ownership." Until the throes of death came over the Prophet (peace and blessings be upon him) and his tongue ceased to speak.
Al-Tabarani recorded it; its chain contains Ubaydullah bin al-Walid al-Wassafi, who is matruk (abandoned).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب العتق / 7218