Jamieson, Fausset and Brown on Ezekiel 14:7

7. stranger--the proselyte, tolerated in Israel only on condition of worshipping no God but Jehovah (Le 17:8, 9).

inquire of him concerning me--that is, concerning My will.

by myself--not by word, but by deed, that is, by judgments, marking My hand and direct agency; instead of answering him through the prophet he consults. Fairbairn translates, as it is the same Hebrew as in the previous clause, "concerning Me," it is natural that God should use the same expression in His reply as was used in the consultation of Him. But the sense, I think, is the same. The hypocrite inquires of the prophet concerning God; and God, instead of replying through the prophet, replies for Himself concerning Himself.