1 Corinthians 3:12-15

Some will use gold or silver or precious stones in building on the foundation; others will use wood or grass or straw. And the quality of each person's work will be seen when the Day of Christ exposes it. For on that Day fire will reveal everyone's work; the fire will test it and show its real quality. If what was built on the foundation survives the fire, the builder will receive a reward. But if anyone's work is burnt up, then he will lose it; but he himself will be saved, as if he had escaped through the fire.