It is narrated from Sayyiduna Abu al-Tufayl (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) came while Sayyiduna Ali (may Allah be pleased with him) was sleeping on the dust, and he (peace and blessings be upon him) said: "Indeed, the most fitting of your names for you is Abu Turab; you are Abu Turab."
This hadith is not narrated from Sayyiduna Abu al-Tufayl (may Allah be pleased with him) except with this chain, and Abd al-Rahman bin Salih (may Allah have mercy on him) is alone in narrating it.