21 Heb “fruit.” The following word “food” in the Hebrew text (אָכְלוֹ, ’okhlo) appears to be an explanatory gloss to clarify the meaning of the rare word נִיב (niv, “fruit”; see Isa 57:19 Qere; נוֹב, nov, “fruit,” in Kethib). Cf. “the fruit thereof, even its food.” In this cultic context the reference is to the offerings on the altar.

In other versions

But you profane it when you say that the Lord’s table is polluted, and its fruit, that is, its food, may be despised.

“But you profane it by saying, ‘The Lord’s table is defiled,’ and, ‘Its food is contemptible.’

“But you are profaning it when you say, ‘The Lord’s table is defiled, and its product, its food, is contemptible.’

“But you dishonor my name with your actions. By bringing contemptible food, you are saying it’s all right to defile the Lord’s table.

“But you are profaning it by saying the table of the Lord is defiled, and its fruit—its food—is despised!

But ye have profaned it, in that ye say,

The table of the Lord is polluted;

And the fruit thereof, even his meat, is contemptible.

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