What is the ruling on acting upon the saying regarding writing a specific verse from Surat Al-A'raf with the intention of blessing one's wealth?

This statement is incorrect and has no proof from the Quran, Sunnah, or the actions of the Salaf. Whoever desires an abundance of provision should fear Allah the Almighty, obey Him, and abstain from His prohibitions. This is the greatest means to ample provision. Allah the Almighty says: "And whoever fears Allah - He will make for him a way out And will provide for him from where he does not expect."