Al-Mukhtasar
فَٱتَّخَذْتُمُوهُمْ سِخْرِيًّا حَتَّىٰٓ أَنسَوْكُمْ ذِكْرِى وَكُنتُم مِّنْهُمْ تَضْحَكُونَ ﴿١١٠﴾
You took these believers who called upon their Lord as a joke, mocking them and making fun of them, until being engrossed in mocking them made you forget Allah’s remembrance and you used to laugh at them, jokingly and mockingly.