Sayyiduna Ibn Abi Marhab (may Allah be pleased with him) says that Sayyiduna Abd al-Rahman bin Awf (may Allah be pleased with him) went down into the blessed grave of the Prophet (peace and blessings be upon him). It is as if I am looking at those four men.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 7042