1 Chronicles 5:18

The sons of Reuben and the Gadites and the half-tribe of Manasseh, consisting of valiant men, men who bore shield and sword and shot with bow and were skillful in battle, were 44,760, who went to war.

Numbers 1:3

from twenty years old and upward, whoever is able to go out to war in Israel, you and Aaron shall number them by their armies.

Joshua 4:12-13

The sons of Reuben and the sons of Gad and the half-tribe of Manasseh crossed over in battle array before the sons of Israel, just 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
The sons of Reuben and the sons of Gad and the half-tribe of Manasseh crossed over in battle array before the sons of Israel, just as Moses had spoken to them;