Job 39:21

“He paweth in the valley, etc.] Where armies are usually pitched and set in battle army, and especially the cavalry, for which the valley is most convenient; and here the horse is impatient of engaging, cannot stand still, but rises up with his fore feet and paws and prances, and, as the word signifies, digs the earth and makes it hollow, by a continual striking upon it; so generally horses are commonly described in this manner f1407; and rejoiceth in [his] strength; of which he is sensible, and glories in it; marches to the battle with pride and stateliness, defying, as it were, the enemy, and as if sure of victory, of which he has knowledge when obtained; for Lactantius says f1408 of…”

“valley--where the battle is joined. goeth on--goeth forth (Num 1:3; Num 21:23).”

“He paweth in the valley - Margin, “or, His feet dig.” The marginal reading is more in accordance with the Hebrew. The reference is to the well known fact of the “pawing” of the horse with his feet, as if he would dig up the ground. The same idea occurs in Virgil, as quoted above: caavatque Tellurem, et solido graviter solar ungula cornu. Also in Apollonius, L. iii. “Argonauticon:” Ὡς δ ̓ ἀρήΐος ἵππος, ἐελδόμενος πολεμοίο, Σκαρθμῷ ἐπιχρεμέθων κρούει πέδον. Hōs d' arēios hippos, eeldomenos polemoio, Skarthmō epichremethōn krouei pedon. “As a war-horse, impatient for the battle, Neighing beats the ground with bis hoofs” He goeth on to meet the armed men - Margin, “armor.” The…”

“Valley - Battles used to be pitched in valleys, or low grounds, especially horse battles. Job 39:23”

“He paweth: or, His feet dig, Jdg 5:22 and: Sa1 17:4-10, Sa1 17:42; Psa 19:5; Jer 9:23 he goeth: Pro 21:31; Jer 8:6 armed men: Heb. armour Job 39:22”