Ecclesiastes 1:3

What profit— The word יתרון iithron, rendered profit, signifies the surplus, or that which remains after allowance is made for toils and fatigue, &c. It occurs eleven times in this book; and I think, says Mr. Desvoeux, the original notion of residue or remainder may well be preserved in every place, and will generally set the author's meaning in a better light than any other expression; though it may be sometimes convenient to make use of some other word.