Already has He sent you Word in the Book, that when ye hear the signs of God 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 God will collect the hypocrites and those who defy faith - all in Hell:- (4:140)

When thou seest men engaged in vain discourse about Our signs, turn away from them unless they turn to a different theme. If Satan ever makes thee forget, then after recollection, sit not thou in the company of those who do wrong. (6:68)