Those who fear their Lord in their most secret thoughts, and who hold the Hour (of Judgment) in awe.
allaziina yakhsyawna rabbahum bilghaybi wahum mina assaa‘ati musyfiquuna
those who fear their Lord in concealment from people that is when they are in seclusion from them and who on account of the Hour that is on account of its terrors are apprehensive fearful.