allah was pleased with the believers when they swore allegiance to you under the tree and he knew what was in their hearts. therefore he sent downtranquility upon them and rewarded them with a victory close by
لقد رضي الله عن المؤمنين إذ يبايعونك تحت الشجرة فعلم ما في قلوبهم فأنزل السكينة عليهم وأثابهم فتحا قريبا