Is it permissible to recite a verse from the Holy Quran for a specific purpose, such as mentioning one of Allah's 99 Most Beautiful Names 99 times, and then supplicating for a need, with this being a form of seeking intercession with Allah without any element of polytheism?

It is permissible to ask Allah by His Most Beautiful Names, such as: "O Most Merciful, have mercy on me." However, specifying a particular verse with a specific number of repetitions (99 times or otherwise) without valid evidence is a forbidden innovation (bid'ah), because it involves worshipping Allah in a manner not prescribed in the Sharia. The Prophet, peace and blessings be upon him, said: "Whoever introduces into this affair of ours that which is not part of it, it will be rejected."