What was true of the three men when they came out of the fiery furnace?

Answer: No smell of fire was on them

The fire had no effect on them: not a hair was singed, their robes were unaffected, and there was no smell of fire on them.

“and when the satraps, prefects, governors, and royal advisers had gathered around, they saw that the fire had no effect on the bodies of these men. Not a hair of their heads was singed, their robes were unaffected, and there was no smell of fire on them.”— Daniel 3:27 (BSB)