And it has already come down to you in the Book [i.e., the Qur’ān] that when you hear the verses of Allāh [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.1 Indeed, Allāh will gather the hypocrites and disbelievers in Hell all together -
Translation: Saheeh International (English)
1 In this world, by participation in their blasphemy, and in the next, where you will share their punishment.
Allah has already revealed to you, O believers, in the noble Qur’ān that if you are sitting in a gathering and you hear a person disbelieving in Allah’s words starting to make fun of them, then you must not sit with them and you must leave the gathering until they begin speaking about something other than disbelief and making fun of Allah’s words. If you sit with them while you hear them disbelieving in and mocking at Allah’s words, then you are like them in not following Allah’s instruction, because you went against Allah by sitting with them just as they went against Him by disbelieving in Him. Allah will gather the hypocrites, who show themselves as Muslims on the outside but hide disbelief inside themselves, and the disbelievers together in the fire of Hell on the Day of Judgement.