Word by Word Analysis

قُلْ أَرَءَيْتُمْ إِنْ أَتَىٰكُمْ عَذَابُهُۥ بَيَـٰتًا أَوْ نَهَارًا مَّاذَا يَسْتَعْجِلُ مِنْهُ ٱلْمُجْرِمُونَ 50

Say, "Have you considered: if His punishment should come to you by night or by day - for which [aspect] of it would the criminals be impatient?"