'Gain' in the Bible

Woe to them! For they have gone the [defiant] way of Cain, and for profit they have run headlong into the error of Balaam, and perished in the rebellion of [mutinous] Korah.

These people are [habitual] murmurers, griping and complaining, following after their own desires [controlled by passion]; they speak arrogantly, [pretending admiration and] flattering people to gain an advantage.