'Doest' in the Bible

and keep the charge of Jehovah thy God, to walk in his ways, to keep his statutes, and his commandments, and his ordinances, and his testimonies, according to that which is written in the law of Moses, that thou mayest prosper in all that thou doest, and whithersoever thou turnest thyself.

And he came thither unto a cave, and lodged there; and, behold, the word of Jehovah came to him, and he said unto him, What doest thou here, Elijah?

And it was so, when Elijah heard it, that he wrapped his face in his mantle, and went out, and stood in the entrance of the cave. And, behold, there came a voice unto him, and said, What doest thou here, Elijah?

And the prophet came near to the king of Israel, and said unto him, Go, strengthen thyself, and mark, and see what thou doest; for at the return of the year the king of Syria will come up against thee.