Leviticus 23:22

‘Now when you reap the harvest of your land, you shall not reap to the very corners of your field, nor shall you gather the gleanings of your harvest.

then make an offering by fire to Yahweh, a burnt offering or a sacrifice to fulfill a special vow, or as a freewill offering or in your appointed times, to make a soothing aroma to Yahweh, from the herd or from the flock.

“When you reap your harvest in your field and have forgotten a sheaf in the field, you shall not go back to get it; it shall be for the sojourner, for the orphan, and for the widow, in order that Yahweh your God may bless you in all the work of your hands.

And Ruth the Moabitess said to Naomi, “Please let me go to the field and glean among the ears of grain after one whom I may find favor in his eyes.” And she said to her, “Go, my daughter.”

“And it shall be the prince’s part to provide the burnt offerings, the grain offerings, and the drink offerings, at the feasts, on the new moons, and on the sabbaths, at all the appointed times of the house of Israel; he shall provide the sin offering, the grain offering, the burnt offering, and the peace offerings, to make atonement for the house of Israel.”