'Trained' in the Bible

And Abram heard that his brother was taken captive; and he led out his trained servants, born in his house, three hundred and eighteen, and pursued them as far as Dan.

What wilt thou say when he shall visit thee, since thou thyself hast trained them to be princes in chief over thee? Shall not sorrows take thee, as a woman in travail?

I have indeed heard Ephraim bemoaning himself thus: Thou hast chastised me, and I was chastised as a bullock not trained: turn thou me, and I shall be turned; for thou art Jehovah my God.

I have indeed trained, I have strengthened their arms, but they imagine mischief against me.

And Ephraim is a trained heifer, that loveth to tread out the corn; I have passed over upon her fair neck: I will make Ephraim to draw; Judah shall plough, Jacob shall break his clods.