By the heaven and the night comer.
By the sky and Al-Taareq
By the sky, and by the nightly comer
By the heaven and the Comer by night
And/by the sky/space, and/by the Night Comer/star (Morning Star)
God hereby swears by the awesomeness of the sky…
By oath of the heaven, and by oath of the nightly arriver
By the heaven and the Morning Star
By the (endless expanse and infinite space of) heaven and the Nightly (discernable) Visitant
I call to witness the heaven and the visitant (in the darkness) of the night
By the heaven, and At-Tariq (the night-comer, i.e. the bright star)