Translation:

9. `We used indeed to sit there in (hidden) stations to (steal) a hearing; but any who listens now will find a flaming fire watching him in ambush.

Notes (Tafseer)

5734. What is the force of "now"? It refers to the early Makkan period of Revelation. It means that whatever excuse there may have been before, for people to try to seek out the hidden truths of the Unseen World through jinns, there was none now, as the perspicuous Qur-an had restored the Message of Unity and cleared religion of all the cobwebs, mysteries, and falsehoods with which priestcraft and pious fraud had overlaid it. The result is that such seekers after false hidden knowledge will find themselves confronted now by the flaming fire, which, like the shafts of meteoric light (see note), will lie in wait for and nip such priestcraft and black magic in the bud.