Is the Hadith: "He who prays 4 rak'ahs before Dhuhr and 4 after it, the Fire shall not touch his body" authentic, and can this virtue be attained by praying four rak'ahs before the Friday prayer and four after it, or is it limited to two rak'ahs before it and two after it?

It has been authentically reported from the Prophet, peace and blessings be upon him, that "Whoever observes four rak'ahs before Dhuhr and four after it, will be forbidden from the Fire." There is no prescribed pre-Jumu'ah sunnah prayer; rather, general supererogatory prayers have been mentioned. It is not correct to liken it to the Dhuhr prayer due to their many differences in rulings, and because this was not reported from the Prophet, peace and blessings be upon him. As for prayer after Jumu'ah, several Hadith have been reported concerning it.