1 Chronicles 5:18

The children of Reuben and the Gadites and half the tribe of Manasseh, of valiant men, men who carried shield and sword, drawing the bow and skilful in war, were forty-four thousand seven hundred and sixty, able to go forth to war.

Numbers 1:3

from twenty years and upward, all that go forth to military service in Israel: ye shall number them according to their hosts, thou and Aaron.

Joshua 4:12-13

And the children of Reuben, and the children of Gad, and the half tribe of Manasseh, went over in array before the children of Israel, as Moses had spoken to 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, went over in array before the children of Israel, as Moses had spoken to them.