Is it permissible to perform i'tikaf in the mosques on the night of Friday, which they call the Night of Dhikr?

The questioner : Is it permissible to perform i'tikaf on the night of Friday in the mosques, given that this group calls it "Laylat al-Dhikr," meaning the night of knowledge? We ask your eminence to clarify this.

The Shaykh : Well, by Allah, this is something I was surprised by just now. I did not know that there was a group that actually takes it upon themselves to contradict this hadith that I am about to recite to you.
He (peace and blessings be upon him) said: That is, it is not permissible for a Muslim, if it is his habit to pray every night, to not pray on the night of Friday, or to not keep it alive. How much more so if he does not pray on any night of the week, but when the night of Friday comes, he keeps it alive? This is what the verse applies to, which we always and forever repeat to your ears, namely the saying of He (Blessed and Exalted is He): Linguistically, "mushaqqaqah" means opposition and contradiction. So the Messenger of Allah advises the Muslims and says to them: Therefore, it is not permissible for a Muslim to come to contradict, no matter what excuse he has, to contradict the Messenger (peace and blessings be upon him) in such a ruling or in any other. It is not prescribed to keep the night of Friday alive for this explicit prohibition, and perhaps this extent is sufficient.