'Uqba ibn 'Abdullah ibn 'Amr who said, "While we were sitting
with the Prophet, may Allah bless him and grant him peace, in the shade
of a tree while travelling between Makka and Madina, a bedouin, who was
an example of the coarsest and fiercest kind of people came up and said,
'Peace be upon you,' and they said, 'And upon you.'"
'Ali said, "'Ammar asked for permission to enter to visit the
Prophet, may Allah bless him and grant him peace, and the Prophet recognised
his voice and said, 'Welcome with the best and purest greeting!'"