'Gain' in the Bible

and I saw as a sea of glass mingled with fire, and those who do gain the victory over the beast, and his image, and his mark, and the number of his name, standing by the sea of the glass, having harps of God,

for in an hour so great riches is made desolate. And every shipmaster, and every one that saileth any wither, and mariners, and as many as gain their living by sea, stood afar off,