Noun
a fireproof metal strongbox (usually in a bank) for storing valuables
Source: WordNetsafety deposit
We are to do what Paul meant, when he said that he had committed to Christ what He was able to keep. You have treasures that you dare not leave in your own house, and so you lock them up in some safety-deposit vault. When they are thus secured, you feel little anxiety regarding them. George C. Lorimer