Translation
When you reap the harvest in your field and you forget a sheaf
Go to footnote numberin the field, do not go back to fetch it; it shall be for the foreigner, the fatherless and the widow, so that YHVH your ELOHIM (read Adonai your Elohim) may bless you abundantly
Go to footnote numberin all the work of your hands.
Paraphrase
If you are harvesting a field of grain (one of your key staples) and you leave behind a big pile of it and later you are made aware of it, do not go back to get it; leave it there for those who have trouble finding jobs, and those who have no close relatives to care for them. Treat others well so that THE ETERNAL AND PERSONAL GOD who is YOUR CREATOR AND RULER will treat you well also.
Footnotes
1
What is a sheaf? When harvesting grains, they used to cut the stalks of grain close to the ground and tie a bunch of the stalks together. Then they would stand the bunch of stalks upright; that is called a sheaf. They would place a number of sheaves together and then lay a few sheaves across the top so that water would not get directly on all the grain heads, but they would get some moisture on them and lots of sun. They would let the sheaves stand in the fields this way for 7 to 10 days.
Why? They would do this (and the Amish still do) in order to allow the grains to begin to germinate and their enzymes to be released to do their job. That is the healthiest way to eat grains because those enzymes work with our bodies to make grains easier to digest. Even the gluten in the partially germinated (sprouted) grains is easier to digest. I am almost certain that there was no intolerance to gluten before man stopped using this ancient method.
2
The verb for “bless” is an intensified form here, so it is not just “bless” but “bless abundantly.”