﴿ إِنَّ ٱلَّذِينَ لَا يُؤْمِنُونَ بِٱلْءَاخِرَةِ لَيُسَمُّونَ ٱلْمَلَٰٓئِكَةَ تَسْمِيَةَ ٱلْأُنثَىٰ ﴾

“Behold, it is [only] such as do not [really] believe in the life to come that regard the angels as female beings;”

Please check ayah 53:30 for complete tafsir.