Deuteronomy 14:29

29And the Levite, because ahe has no portion or inheritance with you, and the sojourner, the fatherless, and the widow, who are within your towns, shall come and eat and be filled, that bthe Lord your God may bless you in all the work of your hands that you do.

Deuteronomy 15:10

10You shall give to him freely, and cyour heart shall not be grudging when you give to him, because dfor this the Lord your God will bless you in all your work and in all that you undertake.
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