Tafsir of Al Imran 3:66

هاأنتم هوﻻء حاججتم فيما لكم به علم فلم تحاجون فيما ليس لكم به علم

Verily, you are those who have disputed about that of which you have knowledge. Why do you then dispute concerning that of which you have no knowledge! This Ayah criticizes those who argue and dispute without knowledge, just as the Jews and Christians did concerning Ibrahim. Had they disputed about their religions, which they had knowledge of, and about the Law that was legislated for them until Muhammad was sent, it would have been better for them. Rather, they disputed about what they had no knowledge of, so Allah criticized them for this behavior. Allah commanded them to refer what they have no knowledge of to He Who knows the seen and unseen matters and Who knows the true reality of all things. This is why Allah said,

والله يعلم وأنتم ﻻ تعلمون

It is Allah Who knows, and you know not. Allah said,