I read in a book that the one who does not pray Fajr with the Muslims without an excuse is a liar in his declaration of la ilaha illa Allah (there is no god but Allah)!

Question:
He says: Honorable Shaykh, may Allah grant you success. I read in a book by one of the da'wah workers that one of the conditions of la ilaha illa Allah is sincerity. He says that the one who says la ilaha illa Allah but does not pray Fajr with the Muslims without a valid legal excuse is a liar in his declaration of la ilaha illa Allah. And the one who says la ilaha illa Allah and places his money in banks is a liar in his declaration of la ilaha illa Allah. Is this statement correct?

Answer:
This contains exaggeration. There is no doubt that this is a deficiency, a deficiency in his submission. It is not a deficiency in sincerity; this is not from the conditions of sincerity. This is from the submission, because one of the conditions of la ilaha illa Allah is submission. So this person has not submitted completely; his submission is deficient. It does not invalidate la ilaha illa Allah, but it diminishes its reward. Yes.