Surah 58. Al-Mujadilah, Ayah 8

The prohibition referred to here arises from the Qur'anic statement, "No good comes, as a rule, out of secret confabulations - save those which are devoted to enjoining charity, or equitable dealings, or setting things to rights between people" (see 4:114 and the corresponding note [138]). Although there is no doubt that, as the classical commentators point out, the "secret confabulations" spoken of in this passage relate to intrigues aimed against the Prophet and his followers by some of their unbelieving contemporaries, there is no doubt, either, that the passage has a general import, and is, therefore, valid for all times.

I.e., in the wider sense, disobedience to the Apostle's ethical teachings.

The reference to "approaching" the Prophet has here a twofold meaning, relating literally to his unbelieving contemporaries, and figuratively to an intellectual "approach" to his person and his teachings by hostile critics of all later times. The same observation is valid with regard to the next clause as well.

Lit., "with which God has never saluted thee". Historically, this is an allusion to the hostile attitude of the Jews of Medina towards the Prophet. It is recorded that instead of pronouncing the traditional greeting "Peace be upon thee" when encountering him, some of them used to mumble the word salam ("peace") in such a way as to make it indistinguishable from sam ("death"); and they employed the same scurrilous play of words with regard to the Prophet's Companions as well. (The relevant ahadith are quoted in full, with indication of the sources, by Tabari and Ibn Kathir in their commentaries on the above verse.) But see also the preceding note.

Sc., "if Muhammad is truly a prophet".

 Some Jews used to  play with words when they addressed the Prophet (ﷺ) to ridicule him, saying for example ‘Asâmu ’alaikum’ (death be upon you) instead of ‘Asalâmu ’alaikum’ (peace be upon you)—which is the greeting of Islam, inspired by Allah.

The salutation of Allah was (and is) "Peace!" But the enemies, who had not the courage to fight openly often twisted the words, and by using a word like "Sam", which meant "Death!" or "Destruction!" instead of "Salam!" (Peace!), they thought they were secretly venting their spite and yet apparently using a polite form of salutation. Cf. ii. 106, and n. 107, where another similar trick is exposed.

The enemies derisively enjoyed their trick (see last note) according to their own perverted mentality. They asked blasphemously, "Why does not Allah punish us?" The answer is given: there is a Punishment, far greater than they imagine: it will come in good time: it will be the final Punishment after Judgment: it is delayed in order to give them a chance of repentance and reformation.

When the Muslim Brotherhood was acquiring strength in Madinah and the forces of disruption were being discomfited in open fight against the Messenger of Righteousness, the wicked resorted to duplicity and secret intrigues, in which the ringleaders were the disaffected Jews and the Hypocrites, whose machinations have been frequently referred to in the Qur-an. E.g. see ii. 8-16; and iv. 142-145.