Musannaf Ibn Abi Shayba 33:87

Abu Mu'awiyah narrated to us, from al-A'mash, from Abu Sufyan, from his elders, who said: Sa'd ibn Abi Waqqas entered upon Salman to visit him, and he wept. Sa'd said to him, "What makes you weep, O Abu 'Abd Allah? The Messenger of Allah (may Allah bless him and grant him peace) passed away while he was pleased with you, and you shall meet him and arrive at the Basin [al-Hawd] before him." Salman said, "As for me, I do not weep out of fear of death, nor out of greed for the world. But the Messenger of Allah (may Allah bless him and grant him peace) made a covenant with us, saying: 'Let the provision of one of you be like the provisions of a rider.' And here I am, surrounded by these belongings." It was said that around him were a pillow, a bowl, and a water vessel. Sa'd said, "O Abu 'Abd Allah, give us a final instruction that we may hold onto after you." He said, "O Sa'd, remember Allah when you are concerned, when you intend to act, when you judge, and when you extend your hand to swear an oath."