Another matter, what is written prior to this passage? “Beware lest you forsake the Levite” (Deuteronomy 12:19), and then, “when the Lord your God will expand your border.” Rabbi Levi said: To what is the matter comparable? To one who says to another: ‘Lend me one gold piece.’
He said to him: ‘I am not familiar with your credit [history].’ He said to him: ‘Test me.’ He gave it to him, and he repaid him immediately [when the loan was due]. He said to him: ‘Even if you need twenty to thirty gold pieces, take them.’
He said: ‘What caused you to [be able to] take everything that you wish? It is because you proved to me that your credit is good.’ So too, when a person is tested and separates his tithes appropriately, his border is expanded. That is, according to your gift, your own [property] is expanded.