MAL 3:10

10 Bring ye kol hama'aser [(all the tithes)] into the Beis HaOtzar [(House of the Treasury)], that there may be teref [(food)] in Mine Beis, and prove Me now herewith, saith Hashem Tzva'os, if I will not open you the windows of Shomayim, and pour you out a brocha, that there shall not be room enough to receive it.