Hazrat ‘Uthmaan (radhiyallahu ‘anhu) remarked, “At that time, hearing the curse of Rasulullah (sallallahu ‘alaihi wasallam), every single one of them was trembling with fear.” Saying this, Rasulullah (sallallahu ‘alaihi wasallam) set out for home with us behind him. Rasulullah (sallallahu ‘alaihi wasallam) then said to us:
أبشروا فإن الله مظهر دينه ومتم كلمته وناصر دينه إن هؤلاء الذين ترون ممن يذبح بأيديكم عاجلا
Accept glad tidings from me, for Allah will indeed make his deen prevail, He will complete His word and assist His deen. These people whom you see – Allah Ta‘ala will soon slaughter them at your hands.
Hazrat ‘Uthmaan (radhiyallahu ‘anhu) says:
فوالله لقد رأيتهم ذبحهم الله بأيدينا
By Allah! I saw them all slaughtered at our hands!
Extracted from Seeratul Mustafa 1/206