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
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.