Good News Translation
At one point the flames died down, so that they wouldn't destroy the creatures sent to punish the ungodly. Those people had to learn that they were being overtaken by your judgment.

New Revised Standard Version
At one time the flame was restrained, so that it might not consume the creatures sent against the ungodly, but that seeing this they might know that they were being pursued by the judgment of God;

Contemporary English Version
One time you kept the fire under control, so that it would not destroy the frogs and flies that were sent to punish those pagans and to let them know you were the one doing all of this.

New American Bible
Then the flame was tempered so that the beasts that were sent upon the wicked might not be burnt up, but that these might see and know that they were struck by the judgment of God;

Douay-Rheims Bible
For at one time the fire was mitigated, that the beasts which were sent against the wicked might not be burnt, but that they might see, and perceive that they were persecuted by the judgment of God.

For at one time the fire was mitigated, that the beasts which were sent against the wicked might not be burnt, but that they might see, and perceive that they were persecuted by the judgment of God.

Wisdom 16:16
For the wicked that denied to know thee, were scourged by the strength of thy arm, being persecuted by strange waters, and hail, and rain, and consumed by fire.

Wisdom 16:17
And which was wonderful, in water, which extinguisheth all things, the fire had more force: for the world fighteth for the just.

Wisdom 16:19
And at another time the fire, above its own power, burnt in the midst of water, to destroy the fruits of a wicked land.

Wisdom 16:20
Instead of which things, thou didst feed thy people with the food of angels, and gavest them bread from heaven, prepared without labour; having in it all that is delicious, and the sweetness of every taste.