The ruling on enjoining good and forbidding evil on Friday while the imam is delivering the sermon.

The Shaykh : ...the other matter, which is perhaps more important than the previous one; we all know that it is not permissible for one who is in the mosque on Friday to enjoin good and forbid evil, and these are obligatory; by the evidence of his saying (peace and blessings be upon him): . Your saying "be quiet" to someone who is speaking, and speech while the imam is delivering the sermon is forbidden. Your saying to him "be quiet" is your commanding him to do this good, which is considered evil by the Prophet (peace and blessings be upon him) in the explicit wording of this hadith. So, if enjoining good and forbidding evil has fallen away from those who are in the mosque so that they may devote themselves to listening and hearing the imam; then how do we direct the Prophet's (peace and blessings be upon him) command to the one who enters the mosque on Friday to pray two rak'ahs? Is it possible to direct this command as a command for a recommended practice only? And he did not allow one who is in the mosque to occupy himself away from listening to the imam, even with the word "be quiet"; so how does he command the one entering the mosque to pray two rak'ahs, in which there is an occupation of time that is longer and much longer than his saying to the one he sees speaking: "be quiet"? So this and that and that, all these appendages to the command indicate that the greeting of the mosque is not a recommended practice (sunnah) where if one does it he is rewarded, and if he leaves it he is not punished. No, rather the greeting of the mosque is an obligatory duty, and I do not hesitate to say it is an obligation (fard) among the obligations; because we mentioned earlier that there is no difference between our saying this is an obligation (fard) or this is obligatory (wajib).