Reviling Someone in Secret

Is the saying “If you knew the unseen you would be content with what happened to you” correct?

Comment on the du‘aa’, “I strove hard to conceal my sins, and You strove hard, my Lord, in concealing me”

Ruling of saying the word “wayl” (woe)

The du’aa’ “O Allaah, we do not ask You to overturn the decree but we ask You to help us bear its impact”

Is the supplication, “O Allah, show us a bad day for them” regarded as reviling or inveighing against time?

Can he say “Ana faatir (I am not fasting)” if he is not fasting?

Expressions used to refer to one who has died

Ruling on giving the title Sayyiduna to the Prophet (blessings and peace of Allah be upon him) and calling people by the names of Allah

Ruling on cursing specific people