Word by Word Analysis

أَفَأَصْفَىٰكُمْ رَبُّكُم بِٱلْبَنِينَ وَٱتَّخَذَ مِنَ ٱلْمَلَـٰٓئِكَةِ إِنَـٰثًا ۚ إِنَّكُمْ لَتَقُولُونَ قَوْلًا عَظِيمًا 40

Then, has your Lord chosen you for [having] sons and taken [i.e., adopted] from among the angels daughters? Indeed, you say a grave saying.