You can't judge a book by its cover
kɪtaːb koː ɪs keː sareːʋarq seː mʌt ɟaːncoː
In Urdu کتاب کو اس کے سرورق سے مت جانچو
This proverb is used in Urdu-speaking cultures to advise against judging based on appearances.
Example
"کتاب کو اس کے سرورق سے مت جانچو؛ یہ دلچسپ ہو سکتا ہے۔"