Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said,
“... It is your greeting of peace when you enter your household and your greeting of peace to the children of Adam when you meet them. If they return it to you, the angels return it to them. If they do not return it, the angels return it to you, or curse them, or stay silent over them. Whoever belittles any of these, it is a sign of Islam he has abandoned. Whoever casts them all aside has thrown Islam behind his back."
