Bel 1:13

13 But the priests were not worried, because they had made a secret entrance underneath a table in the temple, so that they could go in every night and eat the offerings.

Bel 1:13 In-Context

11 Then they all went with the king into Bel's temple, where the priests said to the king, "Your Majesty, we will go out and let you place the food on the table and prepare the wine. When you leave, you may lock the door behind you and seal it with the royal seal.
12 In the morning when you return, if you find that Bel has not eaten everything, you can put us to death. But if he has, Daniel will die for making false accusations against us."
13 But the priests were not worried, because they had made a secret entrance underneath a table in the temple, so that they could go in every night and eat the offerings.
14 When the priests had left, the king set out the food for Bel. Then Daniel ordered his servants to bring some ashes and scatter them all over the floor of the temple. No one except the king saw them do this. After that they all went out, locked the door, sealed it with the royal seal, and left.
15 That night, as usual, the priests with their wives and children came into the temple by the secret entrance and ate all the food and drank all the wine.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.