When ye eat, i.e. when you are about to eat it; for before they did eat it, they were to offer this offering to God. Of the bread, i.e. the bread-corn, as that word is used. Job 28:5 Psalms 104:15 Isaiah 28:22. Unto the Lord, i.e. to the priest of the Lord, as appears from Ezekiel 44:30.
Related Commentaries of Numbers 15:19
Numbers 15:19
19 Then it shall be, that, when ye eat of the bread of the land, ye shall offer up an heave offering unto the LORD.