Bel 1:21

21 and he became so angry that he had the priests and their families arrested and brought to him. They showed him the secret doors through which they had come in each night to eat the food placed on the table.

Bel 1:21 In-Context

19 But Daniel began to laugh and said to the king, "Before you enter the temple, look at the floor and tell me whose footprints you see there."
20 "I see the footprints of men, women, and children," said the king,
21 and he became so angry that he had the priests and their families arrested and brought to him. They showed him the secret doors through which they had come in each night to eat the food placed on the table.
22 So the king had the priests put to death, and he gave Bel to Daniel, who destroyed the idol and tore down its temple.
23 There was also a huge dragon which the Babylonians worshiped.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.