Cross reference
Ezekiel 4:13
13 Yahweh said, Even thus shall the children of Israel eat their bread unclean, among the nations where I will drive them.
Daniel 1:8
8 But Daniel purposed in his heart that he would not defile himself with the king's dainties, nor with the wine which he drank: therefore he requested of the prince of the eunuchs that he might not defile himself.
Hosea 9:3-4
3 They won't dwell in Yahweh's land; But Ephraim will return to Egypt, And they will eat unclean food in Assyria.
4 They won't pour out wine offerings to Yahweh, Neither will they be pleasing to him. Their sacrifices will be to them like the bread of mourners; All who eat of it will be polluted; For their bread will be for their appetite. It will not come into the house of Yahweh.