And do not say about what your tongues assert of untruth, "This (16:116)

Almuntakhab Fi Tafsir Alquran Alkarim

Do not give a speaking tongue to falsehood at the grossness of which common sense revolts. You create taboos for yourselves out of superstition and designate this as lawful and that as forbidden, wherefore you assert what is false and ascribe it to Allah. Those who relate falsehood to Allah or wittingly endeavour by falsification of words to make things seem divine which are not, shall never be graced with prosperity from heaven, nor with success

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(16:116) Do not ascribe lies to Allah by decreeing with your tongues, "This is lawful and that is unlawful" *116 for those people who ascribe lies to Allah can never come to any good.

And do not say about what your tongues assert of untruth, "This meaning

*116) This verse clearly shows that none but Allah has the right to declare a thing to be lawful or unlawful. Or, in other words, the right of making laws exclusively rests with Allah. Therefore, any person, who will dare to decide about the lawful and the unlawful, will transgress his powers. Of course, a person, who acknowledges the Divine law as the final authority, may deduce from it whether a certain thing or action is lawful or unlawful.
The arrogation of the right of determining the lawful and the unlawful has been declared to be a falsehood on Allah for two reasons: (1) Such a person, so to say, claims that what he declares to be lawful or unlawful disregarding the authority of the Divine Book, has been made lawful or unlawful by God or (2) he means to claim that Allah has given up the authority of making lawful and unlawful and has thus left man free to make his own laws for the conduct of life. It is obvious that each of these claims will be a "falsehood" and a false imputation to Allah.
 

And do not say about what your tongues assert of untruth, "This meaning in Urdu

اور یہ جو تمہاری زبانیں جھوٹے احکام لگایا کرتی ہیں کہ یہ چیز حلال ہے اور وہ حرام، تو اس طرح کے حکم لگا کر اللہ پر جھوٹ نہ باندھا کرو جو لوگ اللہ پر جھوٹے افترا باندھتے ہیں وہ ہرگز فلاح نہیں پایا کرتے