'Serve' in the Bible

The sons of Reuben and Gad and half the tribe of Manasseh had 44,760 warriors who could serve in the army—men who carried shield and sword, drew the bow, and were trained for war.

All these sons of Jediael listed by heads of families were warriors; there were 17,200 who could serve in the army.

From Zebulun: 50,000 who could serve in the army, trained for battle with all kinds of weapons of war, with one purpose to help David.

From Asher: 40,000 who could serve in the army, trained for battle.

“As for you, Solomon my son, know the God of your father, and serve Him with a whole heart and a willing mind, for the Lord searches every heart and understands the intention of every thought. If you seek Him, He will be found by you, but if you forsake Him, He will reject you forever.