وَإِلَىٰ رَبِّكَ فَارْغَبْ
And direct your longing toward your Lord. (الشرح: 8)
Ilā rabbika is a prepositional phrase placed before the verb irghab. This fronting of a verbal complement focuses the desired direction and can convey devotion or exclusivity according to the context. Fa-rghab is an imperative, not a new declarative promise.
Precision requires identifying what has been fronted: it is neither a subject nor a direct object, but a prepositional complement. The wāw connecting this directive to fa-idhā faraghta fa-nṣab joins two thematically coherent instructions rather than repeating one unchanged assertion.