سَبِّحِ اسْمَ رَبِّكَ الْأَعْلَىٰ
Glorify the name of your Lord, the Most High. (87:1)
Sabbiḥ is an imperative; the utterance asks for an act rather than merely describing one. Isma is its object, rabbika is a genitive complement, and al-aʿlā qualifies the Lord. The attribute reinforces the dignity of the act and its object.
Changing an imperative into “you glorify” would change the speech act from instruction to report. Such grammatical form and communicative purpose must be distinguished before assessing eloquence.