Is it permissible to repeat the majestic word "Ya Allah" with each of Allah's Beautiful Names when supplicating, such as: "O Allah, Most Gracious, Ya Allah, O Most Merciful, Ya Allah"? And is this considered an transgression in supplication?

Supplicating to Allah using His Beautiful Names before making a prayer is permissible, and there is no objection to mentioning a Name followed by the majestic word "Allah," as the Name "Allah" encompasses all of His Beautiful Names, and all of this is permissible. However, it is preferable to precede with the majestic word "Allah" and then follow it with the Name appropriate for the need. It is legislated to make abundant supplications without specifying a number, except for what has been reported from the Prophet, peace and blessings be upon him. What some imams do, exaggerating in mentioning all of the Beautiful Names and having the congregants repeat after them, may be contrary to the Sunnah or considered an transgression in supplication.