﴿ وَقِيلِهِۦ يَٰرَبِّ إِنَّ هَٰٓؤُلَآءِ قَوْمٌۭ لَّا يُؤْمِنُونَ ﴾

“[But God has full knowledge of the true be­liever] and of his [despairing] cry: “O my Sustainer! Verily, these are people who will not believe!””

And as for his saying that is the saying of the Prophet Muhammad (s) wa-qīlihi is accusative dependent because it is a verbal noun followed by an implicit verb in other words wa-qāla qīlihi ‘and he said his saying’ ‘O my Lord! These are indeed a people who have no faith’.