Charles Ellicott Commentary 1 Kings 18:36

"And it came to pass at the time of the offering of the [evening] oblation, that Elijah the prophet came near, and said, O Jehovah, the God of Abraham, of Isaac, and of Israel, let it be known this day that thou art God in Israel, and that I am thy servant, and that I have done all these things at thy word." — 1 Kings 18:36 (ASV)

Lord God of Abraham. —In this solemn and earnest invocation of God, as in Exodus 3:15 and Exodus 6:2-3, the name JEHOVAH, describing God as He is in Himself—the One eternal self-existent Being—is united with the name that shows His special covenant with “Abraham, and Isaac, and Israel.” In His own nature incomprehensible to finite being, He yet reveals Himself in moral and spiritual relations with His people, through which they know that which passeth knowledge. The prominence of the name “Jehovah,” repeated three times in this short prayer of Elijah, is significant in relation to his special mission, symbolized in his very name, and so also to his immediate purpose.

He desires to efface himself. The God of Israel is to show Himself as the true worker, not only in the outer sphere by miracle, but in the inner sphere by that conversion of the hearts of the people, which to the prophet’s eye is already effected. Like his antitype in the New Testament, Elijah is but a voice calling on men to prepare the way of the Lord.