Kalda ibn Hanbal reported that Safwan ibn Umayya sent him to the
Prophet, may Allah bless him and grant him peace, during the Conquest of
Makka with some milk, gazelle, and cucumber. (Abu 'Asim said that the meant
vegetables.) The Prophet, may Allah bless him and grant him peace, was
at the top of the valley and I did not give the greeting nor ask for permission.
He said, "Go back and say, 'Peace be upon you. May I enter?' That was after
Safwan had become Muslim."