Hazrat Sufyan Asfari says that I prayed in Hazrat Sha'bi's room. I blew and removed something from my mouth, so he forbade me and said that if you feel something like that, then clean it with your hand.

Hazrat Abu Salih narrates that a relative of Hazrat Umm Salamah blew during prayer and expelled something from his mouth, so Hazrat Umm Salamah said, "Do not do this, because the Prophet (peace and blessings be upon him) said to one of our black slaves whose name was Rabah: 'O Rabah! Rub this soil on your face.'"

Hazrat Yahya bin Abi Kathir has regarded it as undesirable to remove something during prayer by blowing.