﴿ وَإِذَا لَقُوا۟ ٱلَّذِينَ ءَامَنُوا۟ قَالُوٓا۟ ءَامَنَّا وَإِذَا خَلَوْا۟ إِلَىٰ شَيَٰطِينِهِمْ قَالُوٓا۟ إِنَّا مَعَكُمْ إِنَّمَا نَحْنُ مُسْتَهْزِءُونَ ﴾

“And when they meet those who have attained to faith, they assert, "We believe [as you believe]"; but when they find themselves alone with their- evil impulses, they say, "Verily, we are with you; we were only mocking!"”

When they meet laqū is actually laquyū but the damma has been omitted being too cumbersome for pronunciation; likewise the yā’ is omitted because it is unvocalised and is followed by a wāw; those who believe they say ‘We believe’; but when they go apart away from them and return to their devils their leaders they say ‘We are with you in religion; we were only mocking them the believers by feigning belief.