The Essence
Al-Haseeb is the Sufficient One and the Reckoner. He keeps an exact, detailed account of every atom's weight of good and evil. For a believer who trusts Him, Al-Haseeb is entirely sufficient to handle all their affairs.
In the Quran
وَكَفَى بِاللَّهِ حَسِيبًا
"And sufficient is Allah as Accountant (Haseeb). (Surah An-Nisa 4:6)"
In Your Duas
حَسْبِيَ اللَّهُ لاَ إِلَهَ إِلاَّ هُوَ عَلَيْهِ تَوَكَّلْتُ وَهُوَ رَبُّ الْعَرْشِ الْعَظِيمِ
"Sufficient for me is Allah; there is no deity except Him. On Him I have relied, and He is the Lord of the Great Throne."
— Sunan Abi Dawud 5081 (Quran 9:129)