Jesus warned about losing your soul:
Matthew 16:26 For what is a man profited, if he shall gain the whole world, and lose his own soul? or what shall a man give in exchange for his soul?
Mark 8:36 For what shall it profit a man,
if he shall gain the whole world, and lose his own soul?
Luke 9:25 For what is a man advantaged,
if he gain the whole world, and lose himself, or be cast away?
John 12:25 He that loveth his life shall lose it;
and he that hateth his life in this world shall keep it unto life eternal.
John warned about losing rewards:
2 John 1:8 Look to yourselves, that we lose not those things which we have wrought, but that we receive a full reward.
Believer’s Works are judged:
1 Corinthians 3:11-15
11For other foundation can no man lay than that is laid, which is Jesus Christ. 12Now if any man build upon this foundation gold, silver, precious stones, wood, hay, stubble; 13Every man’s work shall be made manifest: for the day shall declare it, because it shall be revealed by fire; and the fire shall try every man’s work of what sort it is. 14If any man’s work abide which he hath built thereupon, he shall receive a reward. 15If any man’s work shall be burned, he shall suffer loss: but he himself shall be saved; yet so as by fire.
Losers (unsaved) are judged for their works:
11And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them.
12And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works.
13And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works.
14And death and hell were cast into the lake of fire. This is the second death.
15And whosoever was not found written in the book of life was cast into the lake of fire.