﴿ وَمَآ أَنتَ إِلَّا بَشَرٌۭ مِّثْلُنَا وَإِن نَّظُنُّكَ لَمِنَ ٱلْكَٰذِبِينَ ﴾

“for thou art nothing but a mortal like ourselves! And, behold, we think that thou art a consummate liar!”

You are just a human being like us. And we indeed in softened in place of the hardened form its subject omitted in other words it would be innahu think that you are one of the liars.