2 verses have
mothers
in Edition Clear Qur'an by Talal Itani / Al-Ahzaab (The Clans)

33:4God did not place two hearts inside any man's body. Nor did He make your wives whom you equate with your mothers, your actual mothers. Nor did He make your adopted sons, your actual sons. These are your words coming out of your mouths. God speaks the truth, and guides to the path.

33:6The Prophet is more caring of the believers than they are of themselves, and his wives are mothers to them. And blood-relatives are closer to one another in God’s Book than the believers or the emigrants, though you should do good to your friends. That is inscribed in the Book.