﴿ حَقِيقٌ عَلَىٰٓ أَن لَّآ أَقُولَ عَلَى ٱللَّهِ إِلَّا ٱلْحَقَّ ۚ قَدْ جِئْتُكُم بِبَيِّنَةٍۢ مِّن رَّبِّكُمْ فَأَرْسِلْ مَعِىَ بَنِىٓ إِسْرَٰٓءِيلَ ﴾

“so constituted that I cannot say anything about God but the truth. I have now come unto you with a clear evidence from your Sustainer: let, then, the children of Israel go with me!"”

I am one for whom it is right for whom it is appropriate to say nothing but the truth about God a variant reading for ‘alā has ‘alayya ‘for me’ in which case haqīqun ‘it is right’ is the subject of the sentence its predicate being an ‘that’ and what follows it sc. ‘I say nothing but the truth about God’. Truly I have come to you with a clear proof from your Lord. So send forth with me to Syria the Children of Israel’ he Pharaoh had enslaved them.