The reading is from St. Paul's First Letter to the Corinthians 3:9-17

Brethren, we are God's fellow workers; you are God's field, God's building. According to the grace of God given to me, like a skilled master builder I laid a foundation, and another man is building upon it. Let each man take care how he builds upon it. For no other foundation can any one lay than that which is laid, which is Jesus Christ. Now if any one builds on the foundation with gold, silver, precious stones, wood, hay, straw - each man's work will become manifest; for the Day will disclose it, because it will be revealed with fire, and the fire will test what sort of work each one has done. If the work which any man has built on the foundation survives, he will receive a reward. If any man's work is burned up, he will suffer loss, though he himself will be saved, but only as through fire. Do you not know that you are God's temple and that God's Spirit dwells in you? If any one destroys God's temple, God will destroy him. For God's temple is holy, and that temple you are.