1 Chronicles 5:18

The sons of Reuben, the Gadites, and the half-tribe of Manasseh—valiant men able to bear shield and sword, and to shoot with the bow, and skillful in war—were 44,760 who went to war.

Numbers 1:3

from twenty years old and upward, all in Israel who are able to go out to war. You and Aaron shall number them, army by army.

Joshua 4:12-13

The sons of Reuben and the sons of Gad and half the tribe of Manasseh crossed over armed for battle before the [other] 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 half the tribe of Manasseh crossed over armed for battle before the [other] sons of Israel, just as Moses had spoken to them;