Musnad Ahmad Hadith 20766

It is narrated from Aseeb (may Allah be pleased with him) that he was present in Madinah Munawwarah at the time of the funeral prayer of the Prophet (ﷺ). People began to say, "How should we perform the funeral prayer for the Prophet (ﷺ)?" Siddiq Akbar (may Allah be pleased with him) said, "Let groups enter one after another." Thus, people would enter from one door, send blessings and peace upon the Prophet (ﷺ), and exit from the other door. When the Prophet (ﷺ) was lowered into the grave, Mughirah (may Allah be pleased with him) said, "There is a part near the blessed feet of the Prophet (ﷺ) that has not been properly arranged." People said, "Then you yourself go down into the grave and arrange it properly." So he went down into the grave and put his hand inside. When he touched the blessed feet, he said, "Today, pour the soil from my side." People began to pour soil until it reached halfway up his shins. Then he came out and said, "I have had the closest time with the Prophet (ﷺ)."