Ubaidullah bin Adi bin Al-Khiyar narrates that Sayyiduna Uthman Ghani (may Allah be pleased with him) said to him: Allah Almighty sent Muhammad (peace be upon him) with the truth. Among those who responded to the call of Allah and His Messenger, I was also included, and among those who believed in the Shariah of the Prophet (peace be upon him), I was also included. Then I migrated to Abyssinia both times. I also had the honor of being the son-in-law of the Prophet (peace be upon him), and I pledged allegiance at the blessed hand of the Prophet (peace be upon him). By Allah! I never disobeyed him nor deceived him, until Allah called him to Himself.
Hadith Referenceمسند احمد / مسند الخلفاء الراشدين / 561