﴿ مُتَّكِـِٔينَ عَلَىٰ سُرُرٍۢ مَّصْفُوفَةٍۢ ۖ وَزَوَّجْنَٰهُم بِحُورٍ عِينٍۢ ﴾

“reclining on couches [of happiness] ranged in rows!” And [in that paradise] We shall mate them with companions pure, most beautiful of eye.”

They will be reclining muttaki’īna is a circumstantial qualifier referring to the concealed subject of God’s words fī jannātin ‘amid gardens’ on ranged couches arranged one next to the other and We will wed them zawwajnāhum is a supplement to jannātin ‘gardens’ meaning ‘We will couple them’ to beautiful houris of wide and beautiful eyes.