And [they are] those who do not testify to falsehood, and when (25:72)

Almuntakhab Fi Tafsir Alquran Alkarim

The worshippers who do not give false evidence nor listen to it, and should they come upon someone whose mouth is full of loud futilities or upon people indulging in personal vanities or in a discourse as futile in effect as it is feeble in principle, they pass by withdrawing nicely and with self- sustained dignity

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

(25:72) (And the servants of the Merciful are those:) who do not bear witness to falsehood *89 and who; if they have ever to pass by what is vain, pass by like dignified people: *90

And [they are] those who do not testify to falsehood, and when meaning

*89) This also has two meanings: (1) They do not give evidence ( in a law court etc.) in regard to a false thing in order to prove it right, when in tact it is a falsehood, or at best a doubtful thing; and (2) they have no intention to witness any thing which is false, evil or wicked as spectators. In this sense, every sin and every indecency, every sham and counterfeit act is a falsehood. A true servant of AIlah recognizes it as false and shuns it even if it is presented in the seemingly beautiful forms of "art" .
*90) The Arabic word laghv implies aII that is vain, useless and meaningless and it also covers "falsehood". The true servants pass by in a dignified manner if ever they come across "what is vain", as if it were a heap of tilth. They do not tarry there to enjoy the "filth" of moral impurity, obscenity or foul language, nor do they intentionally go anywhere to hear or see or take part in any sort of "filth". For further details, see E.N. 4of AI-Mu"minun.
 

And [they are] those who do not testify to falsehood, and when meaning in Urdu

(اور رحمٰن کے بندے وہ ہیں) جو جھوٹ کے گواہ نہیں بنتے اور کسی لغو چیز پر ان کا گزر ہو جائے تو شریف آدمیوں کی طرح گزر جاتے ہیں