Narrated Abdullah ibn Umar: The Messenger of Allah صلی اللہ علیہ وسلم went to Quba to offer prayer. Then the Ansar (the Helpers) came to him and gave him a salutation while he was engaged in prayer. I asked Bilal: How did you find the Messenger of Allah صلی اللہ علیہ وسلم responding to them when they gave him a salutation while he was engaged in prayer. He replied: In this way, and Jafar ibn Awn demonstrated by spreading his palm, and keeping its inner side below and its back side above.