And I have followed the religion of my fathers, Abraham, Isaac and Jacob. And it was not for us to associate anything with Allāh. That is from the favor of Allāh upon us and upon the people, but most of the people are not grateful.
Joseph said that he followed the path of his fathers, Abraham, Isaac and Jacob: the path of worshipping Allah alone. He said it was not right for them to associate anything with Allah, Who is alone in His Oneness. Enabling them to worship Allah alone and have the faith which he and his fathers had was from the grace of Allah upon them. It was also from the grace of Allah upon all people, since He sent the prophets to them with that message; yet most people are not thankful to Allah for His blessings, and instead ungratefully disbelieve in Him.