They look at thrones.
On luxurious furnishings they watch
(reclining) upon couches they will gaze
On raised couches, gazing -
On the luxurious beds/couches they look/watch
Sitting on luxurious furnishings they will enjoy the most eye pleasing views
On thrones, watching
Seated on couches, looking at everything
Reclining on couches, enjoying the wonderful sights
(Reclining) upon raised couches they shall be looking (at every thing all around)
On thrones, looking (at all things)