Tractate Shekalim - Chapter 5 - Mishnah 6 שקלים פרק ה׳ משנה ו׳

There were two chambers in the Temple, one the chamber of secret gifts and the other the chamber of the vessels. The chamber of secret gifts: sin-fearing persons used to put their gifts there in secret, and the poor who were descended of the virtuous were secretly supported from them. The chamber of the vessels: whoever offered a vessel as a gift would throw it in, and once in thirty days the treasurers opened it; and any vessel they found in it that was of use for the repair of the temple they left there, but the others were sold and their price went to the chamber of the repair of the temple.