put your hand unto. Figure of speech Metonymy (of Adjunct), App-6, hand used for all works done by it.
Related Commentaries of Deuteronomy 12:7
Deuteronomy 12:7
7 And there ye shall eat before the LORD your God, and ye shall rejoice in all that ye put your hand unto, ye and your households, wherein the LORD thy God hath blessed thee.