Narrated Muhammad bin `Abbas: I asked Jabir "Did the Prophet forbid fasting on Fridays?" He replied, "Yes." (Other narrators added, "If he intends to fast only that day.")

Narrated Muhammad bin `Abbas bin Ja`far: That he heard Ibn `Abbas reciting: "No doubt! They fold up their breasts." (11.5) and asked him about its explanation. He said, "Some people used to hide themselves while answering the call of nature in an open space lest they be exposed to the sky, and also when they had sexual relation with their wives in an open space lest they be exposed to the sky, so the above revelation was sent down regarding them."

Narrated Muhammad bin `Abbas bin Ja`far: Ibn `Abbas recited. "No doubt! They fold up their breasts." I said, "O Abu `Abbas! What is meant by "They fold up their breasts?" He said, "A man used to feel shy on having sexual relation with his wife or on answering the call of nature (in an open space) so this Verse was revealed:-- "No doubt! They fold up their breasts."