“...while the whole earth will be in His grasp on the Day of Resurrection, and the heavens will be folded up in His right hand. Glorified and Exalted is He above what they associate with Him.” [al-Zumar]
The seven heavens and the seven earths, in the palm of the Most Merciful, are no more than a mustard seed in the palm of one of us.
As for the magnificence of His attributes, do not ask about it: there is not a single one of His attributes that is not supremely magnificent, as Allah, Exalted is He, says:
“To Allah belongs the highest description, and He is the Almighty, the All-Wise.” [al-Nahl: 60]
Thus, you declare Allah, Mighty and Majestic is He, to be transcendent, and after declaring Him transcendent, you describe Him with two utterly perfect qualities: lordship and magnificence. This remembrance therefore combines transcendence and exaltation.
Transcendence and exaltation expressed by the tongue constitute verbal exaltation, while bowing constitutes physical exaltation. Thus, the one who bows combines both forms of exaltation: the verbal and the physical.
For this reason, the Prophet, peace and blessings be upon him, said: “Indeed, I have been forbidden to recite the Quran while bowing or prostrating. As for bowing, then magnify the Lord therein.” (1)
Since the Quran is the noblest form of remembrance, it is not fitting for a person to recite it while in this bowed posture; rather, it is recited while standing.
His statement: “He says: ‘Glory be to my Lord, the Magnificent.’”
The author did not mention how many times one should say this. However, Allah willing, it will come under the discussion of the obligatory acts of prayer that saying it once is obligatory, while anything beyond that is sunnah. (2)