Verses with the word expert in the Old Testament (5 verses):

1 Chronicles 12:33
Of Zebulun, such as went forth to battle, expert in war, with all instruments of war, fifty thousand, which could keep rank: they were not of double heart.

1 Chronicles 12:35
And of the Danites expert in war twenty and eight thousand and six hundred.

1 Chronicles 12:36
And of Asher, such as went forth to battle, expert in war, forty thousand.

Canticles 3:8
They all hold swords, being expert in war: every man hath his sword upon his thigh because of fear in the night.

Jeremiah 50:9
For, lo, I will raise and cause to come up against Babylon an assembly of great nations from the north country: and they shall set themselves in array against her; from thence she shall be taken: their arrows shall be as of a mighty expert man; none shall return in vain.