2 Chronicles 13:3

“And Abijah set the battle in array, with an army of valiant man of war, even four hundred thousand chosen men, etc.] Collected such an army of select men, led them into his enemy’s country, and set them in order of battle: and Jeroboam also set the battle in array against him, with eight hundred thousand chosen men, being mighty men of valour; double the number of Abijah s army, he having ten tribes to collect out of, and Abijah but two.”

“Abijah set the battle in array--that is, took the field and opened the campaign. with . . . four hundred thousand chosen men . . . Jeroboam with eight hundred thousand--These are, doubtless, large numbers, considering the smallness of the two kingdoms. It must be borne in mind, however, that Oriental armies are mere mobs--vast numbers accompanying the camp in hope of plunder, so that the gross numbers described as going upon an Asiatic expedition are often far from denoting the exact number of fighting men. But in accounting for the large number of soldiers enlisted in the respective armies of Abijah and Jeroboam, there is no need of resorting to this mode of explanation; for we know by the…”

“It has been proposed to change the numbers, here and in 2 Chronicles 13:17, into 40,000, 80,000, and 50,000 respectively - partly because these smaller numbers are found in many early editions of the Vulgate, but mainly because the larger ones are thought to be incredible. The numbers accord well, however, with the census of the people taken in the reign of David 1 Chronicles 21:5, joined to the fact which the writer has related 2 Chronicles 11:13-17, of a considerable subsequent emigration from the northern kingdom into the southern one. The total adult male population at the time of the census was 1,570, 000. The total of the fighting men now is 1,200, 000. This would allow for the aged…”

“set: Heb. bound together, Sa1 17:1-3 four hundred: Ch2 11:1, Ch2 14:8, Ch2 17:14-18, Ch2 26:12, Ch2 26:13; Ch1 21:5 eight hundred: Ch2 14:9 2 Chronicles 13:4”

“The War between Abijah and Jeroboam. - היתה מלחמה, war arose, broke out. Ch2 13:3 Abijah began the war with an army of 400,000 valiant warriors. בּחוּר אישׁ, chosen men. את מ אסר, to bind on war, i.e., to open the war. Jeroboam prepared for the war with 800,000 warriors. The number of Jeroboam's warriors is exactly that which Joab returned as the result, as to Israel, of the numbering of the people commanded by David, while that of Abijah's army is less by 100,000 men than Joab numbered in Judah ( Sa2 24:9). Ch2 13:4 When the two armies lay over against each other, ready for the combat, Abijah addressed the enemy, King Jeroboam and all Israel, in a speech from Mount Zemaraim. The mountain…”