«وَلَوْ تَرَى إِذْ وُقِفُوا عَلَى النَّارِ»
If only you could see when they are made to stand before the Fire.
This is part of Qurʾān 6:27. The apodosis of law (لو) is not expressed in the quoted construction. The context invites the hearer to imagine an overwhelming scene; a teaching paraphrase such as “you would see something terrible” is an explanation, not the Qurʾānic wording.
The omission creates an effect beyond brevity: it allows the listeners' minds to grasp the scene's gravity without enclosing it in one ordinary descriptive statement.