A greyhound; an he goat also; and a king, against whom there is no rising up.

Wesley's Notes

30:31 An he - goat - Which marches in the head of the flock in a grave and stately manner, conducting them with great courage and resolution, and being ready to fight for them, either with beasts or men that oppose him. A king - Heb. a king and his people with him, a king when he hath the hearts and hands of his people going along with him in his undertakings.

King James Translators' Notes

greyhound: or, horse: Heb. girt in the loins

Matthew Henry's Concise Commentary

30:24-28. Four things that are little, are yet to be admired. There are those who are poor in the world, and of small account, yet wise for their souls and another world. 29-33. We may learn from animals to go well; also to keep our temper under all provocations. We must keep the evil thought in our minds from breaking out into evil speeches. We must not stir up the passions of others. Let nothing be said or done with violence, but every thing with softness and calmness. Alas, how often have we done foolishly in rising up against the Lord our King! Let us humble ourselves before him. And having found peace with Him, let us follow peace with all men.