Hijrah to Abyssinia:

After Hazrat ‘Uthmaan (radhiyallahu ‘anhu) accepted Islam, his uncle, Hakam bin Abil ‘Aas bin Umayyah, caught him and shackled him. He said to Hazrat ‘Uthmaan (radhiyallahu ‘anhu), “Have you turned away from the religion of your forefathers, accepting a new religion? By Allah! I will never release you until you forsake this new religion that you are following!” Hazrat ‘Uthmaan (radhiyallahu ‘anhu) replied, “By Allah! I will never leave this religion nor will I part from it!” Eventually, when Hakam saw the firmness and determination with which Hazrat ‘Uthmaan (radhiyallahu ‘anhu) adhered to Islam, he relented and released him.

Hazrat ‘Uthmaan (radhiyallahu ‘anhu) had performed both migrations to Abyssinia with his respected wife, Hazrat Ruqayyah (radhiyallahu ‘anha).

(Tabaqaat ibn Sa’d 3/40)