1 Chronicles 5:18

The sons of Reuben, and the Gadites, and the half-tribe of Manasseh, of valiant men, men able to bear buckler and sword, and to shoot with bow, and skilful in war, were forty and four thousand seven hundred and threescore, that were able to go forth to war.

Numbers 1:3

from twenty years old and upward, all that are able to go forth to war in Israel, thou and Aaron shall number them by their hosts.

Joshua 4:12-13

And the children of Reuben, and the children of Gad, and the half-tribe of Manasseh, passed over armed before the children of Israel, as Moses spake unto them:

Treasury of Scripture Knowledge

Summary

The sons of Reuben, and the Gadites, and half the tribe of Manasseh, of valiant men, men able to bear buckler and sword, and to shoot with bow, and skilful in war, were four and forty thousand seven hundred and threescore, that went out to the war.

Four and forty

Bible References

Four and forty

Joshua 4:12
And the children of Reuben, and the children of Gad, and the half-tribe of Manasseh, passed over armed before the children of Israel, as Moses spake unto them:

American Standard Version Public Domain