American Standard Version
Lord, have mercy on my son: for he is epileptic, and suffereth grievously; for oft-times he falleth into the fire, and off-times into the water.

Berean Study Bible
“Lord, have mercy on my son,” he said. “He has seizures and is suffering terribly. He often falls into the fire or into the water.

Douay-Rheims Bible
Lord, have pity on my son, for he is a lunatic, and suffereth much: for he falleth often into the fire, and often into the water.

English Revised Version
Lord, have mercy on my son: for he is epileptic, and suffereth grievously: for oft-times he falleth into the fire, and oft-times into the water.

King James Bible
Lord, have mercy on my son: for he is lunatick, and sore vexed: for ofttimes he falleth into the fire, and oft into the water.

World English Bible
"Lord, have mercy on my son, for he is epileptic, and suffers grievously; for he often falls into the fire, and often into the water.

Young's Literal Translation
and saying, 'Sir, deal kindly with my son, for he is lunatic, and doth suffer miserably, for often he doth fall into the fire, and often into the water,

Matthew 17:15 Additional Translations ...