It is narrated from Hazrat Hudhaifa (may Allah be pleased with him) that we were sitting with the Noble Prophet (peace and blessings be upon him), when he said: "I do not know how much longer I will remain among you. So follow those two who will be (caliphs) after me." And he (peace and blessings be upon him) pointed towards Hazrat Abu Bakr and Hazrat Umar: "And act according to the way of Ammar. And whatever hadith Ibn Mas'ud narrates to you, affirm its truth."