Sforno on Exodus 22:19/ספורנו על שמות כ״ב:י״ט

1זובח לאלוהים, to all the deities simultaneously. This is forbidden even though the worshipper includes Hashem in the address to which the sacrifice is tendered.

2יחרם, the person will be executed and the offering itself is prohibited for any use whatsoever. Just as the false deities are to be banished totally, so those who believe in them. (compare Deuteronomy 7,26 )

3לה' לבדו, excluding any possible partner.