Al-Anbiyaa • BN-TAFSEER-IBN-E-KASEER
﴿ ٱلَّذِينَ يَخْشَوْنَ رَبَّهُم بِٱلْغَيْبِ وَهُم مِّنَ ٱلسَّاعَةِ مُشْفِقُونَ ﴾
“who stand in awe of their Sustainer although He is beyond the reach of human perception, and who tremble at the thought of the Last Hour.”
Please check ayah 21:50 for complete tafsir.