Yusuf Ali
Already has He sent you Word in the Book, that when ye hear the signs of Allah held in defiance and ridicule, ye are not to sit with them unless they turn to a different theme: if ye did, ye would be like them. For Allah will collect the hypocrites and those who defy faith - all in Hell:-

Sahih International
And it has already come down to you in the Book that when you hear the verses of Allah [recited], they are denied [by them] and ridiculed; so do not sit with them until they enter into another conversation. Indeed, you would then be like them. Indeed Allah will gather the hypocrites and disbelievers in Hell all together -

Shakir
And indeed He has revealed to you in the Book that when you hear Allah´s communications disbelieved in and mocked at do not sit with them until they enter into some other discourse; surely then you would be like them; surely Allah will gather together the hypocrites and the unbelievers all in hell.

Pickthall
He hath already revealed unto you in the Scripture that, when ye hear the revelations of Allah rejected and derided, (ye) sit not with them (who disbelieve and mock) until they engage in some other conversation. Lo! in that case (if ye stayed) ye would be like unto them. Lo! Allah will gather hypocrites and disbelievers, all together, into hell;

محمد جالندھری
اور خدا نے تم (مومنوں) پر اپنی کتاب میں (یہ حکم) نازل فرمایا ہے کہ جب تم (کہیں) سنو کہ خدا کی آیتوں سے انکار ہورہا ہے اور ان کی ہنسی اڑائی جاتی ہے تو جب تک وہ لوگ اور باتیں (نہ) کرنے لگیں۔ ان کے پاس مت بیٹھو۔ ورنہ تم بھی انہیں جیسے ہوجاؤ گے۔ کچھ شک نہیں کہ خدا منافقوں اور کافروں سب کو دوزخ میں اکھٹا کرنے والا ہے