The One with extreme Power which is un-interrupted and He does not get tired.
Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ is Al-Matin (in Arabic: ٱلْمَتِينُ), meaning His power is steadfast. It is the same as it was yesterday and will remain tomorrow. He is ever-constant and firm.
