#2 Greet

A group of women standing next to each other in front of a building
A group of women standing next to each other in front of a building
person waving reflecting shadow on teal wall paint
person waving reflecting shadow on teal wall paint

Book of Apostates

(4) Chapter: If somebody else abuses the Prophet (saws)

Hadith 6926

Narrated Anas bin Malik:

A Jew passed by Allah's Messenger (صلى الله عليه و سلم) and said, "As-Samu 'Alaika." Allah's Messenger (صلى الله عليه و سلم) said in reply, "We 'Alaika." Allah's Messenger (صلى الله عليه و سلم) then said to his companions, "Do you know what he (the Jew) has said? He said, 'As-Samu 'Alaika.'" They said, "O Allah's Messenger (صلى الله عليه و سلم)! Shall we kill him?" The Prophet, said, "No. When the people of the Book greet you, say: 'Wa 'Alaikum.'"