The ruling on praying behind an imam who omits some words or letters in the verses

Question:
May Allah reward you with good, and may He do you good. A message was sent by a listener named al-Bashir 'Abd al-Rahman al-Sudani, who asks and says: What is the ruling on praying behind a man who omits a word in some verses or some letters? I have already addressed this matter with him, and he recites it correctly outside of prayer, but not so in prayer. He has not learned it, but rather memorizes it. Is it permissible for us to pray behind him? May Allah reward you with good.

Answer:
If what he omits is in al-Fatihah, then it is not permissible for you to pray behind him, because it is obligatory to recite al-Fatihah completely with its letters, its emphatic letters, and everything that makes its recitation valid. However, if that is in other than al-Fatihah, then the prayer is not invalidated by it, and you may pray behind him, but with teaching him and alerting him. Yes.