سورة Al-Baqarah ( The Cow ) - الآية 140

Or say you that Ibrahim (Abraham), Isma'il (Ishmael), Ishaque (Isaac), Ya'qub (Jacob) and Al-Asbat [the twelve sons of Ya'qub (Jacob)] were Jews or Christians? Say, \"Do you know better or does Allah (knows better… that they all were Muslims)? And who is more unjust than he who conceals the testimony [i.e. to believe in Prophet Muhammad Peace be upon him when he comes, written in their Books. (See Verse 7:157)] he has from Allah? And Allah is not unaware of what you do.\"