This verse is the reverse of the previous verse.

You shall give to him freely: literally “giving you shall give,” the emphatic construction. Good News Translation has “Give to them freely and unselfishly.”

Your heart shall not be grudging: this is a figure of speech for not being stingy, not showing an ungenerous spirit. See the expression “open your hand” with a similar meaning in verse 8.

The LORD your God will bless you in all your work and in all that you undertake: an emphatic statement, achieved by repetition (see 12.7). God will prosper the compassionate Israelites who are generous toward their needy fellow citizens.

Quoted with permission from Bratcher, Robert G. and Hatton, Howard A. A Handbook on Deuteronomy. (UBS Helps for Translators). New York: UBS, 2000. For this and other handbooks for translators see here .