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The Law of Grain Offerings
11‘No grain offering, which you bring to the Lord, shall be made with leaven, for you shall not offer up in smoke any leaven or any honey as an offering by fire to the Lord. 12As an offering of first fruits you shall bring them to the Lord, but they shall not ascend as a soothing aroma on the altar. 13Every grain offering of yours, moreover, you shall season with salt, so that the salt of the covenant of your God will not be lacking from your grain offering; with all your offerings you shall offer salt.
Leviticus 2:11-13 (NASB)