Abu Salih says: I went to the wife of the Messenger, Sayyida Umm Salamah (may Allah be pleased with her), and one of her nephews also came to her. He performed two units of prayer in her house. When he prostrated, he blew on the dust. Sayyida Umm Salamah (may Allah be pleased with her) said to him: Nephew! Do not blow, because the slave of the Prophet (peace and blessings be upon him), named Yasar, blew, and the Prophet (peace and blessings be upon him) said to him: For the sake of Allah, let your face touch the dust.