Narrated Abdullah ibn Umar: The Messenger of Allah ﷺ 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 ﷺ 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.
Hadith Referenceسنن ابي داود / أبواب تفريع استفتاح الصلاة / 927
Hadith Gradingالألبانی:حسن صحيح | زبیر علی زئی:صحيح, أخرجه الترمذي (368 وسنده حسن) وصححه بن الجارود (215 وسنده حسن) وانظر الحديث السابق (925)
Hadith Takhrij« سنن الترمذی/ الصلاة 155 (368)، (تحفة الأشراف: 2038، 8512)، وقد أخرجہ: مسند احمد (6/12) (حسن صحیح) »