How is the reward calculated for saying: "Subhan Allah wa bihamdihi adada an-nujoom (Glorified is Allah and praised is He, by the number of the stars)"? Is it as one glorification, or by the number of stars, whose count is known only to Allah?

Glorifying Allah (Tasbih) is one of the greatest and best forms of remembrance (dhikr). When a Muslim says, "Subhanallah (Glory be to Allah) such and such a number," it is considered glorification according to the number mentioned. An example of this is the Prophet's (peace and blessings be upon him) saying: "Subhanallah wa bihamdihi adada khalqihi, wa rida nafsihi, wa zinata 'arshihi, wa midada kalimatihi (Glory be to Allah and with His praise, as many times as the number of His creation, by His Own Pleasure, by the weight of His Throne, and by the ink of His Words)."