Berean Standard Bible (BSB)
Behold, I will send you Elijah the prophet before the coming of the great and awesome Day of the LORD.
World English Bible (WEB)
Behold, I will send you Elijah the prophet before the great and terrible day of Yahweh comes.
Strong's King James
Behold, I will send{H7971}{(H8802)} you Elijah{H452} the prophet{H5030} before{H6440} the coming{H935}{(H8800)} of the great{H1419} and dreadful{H3372}{(H8737)} day{H3117} of the LORD{H3068}:
The F.O.G *
(5) Behold, I will send you אֵת Eliyahu (God Yahweh) the prophet before the coming of the great and fearful day of יהוה Yahweh.
The F.O.G Message *
Young's Literal Translation
Lo, I am sending to you Elijah the prophet, Before the coming of the day of Jehovah, The great and the fearful.