1 Chronicles 26:32

And his brothers, sons of ability, [were] two thousand seven hundred heads of the {families}, and King David appointed them over the Reubenites, the Gadites, and the half-tribe of Manasseh, for every matter of God and matter of the king.

2 Chronicles 19:11

And behold, Amariah the chief priest [is] over you in all matters of the word of Yahweh, and Zebadiah the son of Ishmael, the governor of the house of Judah, in all matters of the king, and the Levites [shall be] before you [as] officials. Be strong and do [well]! May Yahweh be with the upright."

1 Chronicles 12:37

And from beyond the Jordan, from the Reubenites and the Gadites and the half-tribe of Manasseh, with all [their] weapons of war for battle: one hundred and twenty thousand.

1 Chronicles 15:12

And he said to them, "You [are] the heads of the {families} for the Levites. Sanctify yourselves and your brothers and bring up the ark of Yahweh, the God of Israel, to [the place] I have established for it.

1 Chronicles 23:24

These [were] the sons of Levi according to the house of their fathers, the heads of the {families}, according to their enrollment, by the number of the names, according to their head count, [who were to] do the work of the service of the house of Yahweh, from twenty years old and above.

1 Chronicles 24:31

And lots were also cast [for] these, just as their brothers, the sons of Aaron, before David the king, Zadok, Ahimelech, and the heads of the {families} for the priests and for the Levites the fathers, {on the principle of the chief and younger brother alike}.

Treasury of Scripture Knowledge

Summary

And his brethren, men of valour, were two thousand and seven hundred chief fathers, whom king David made rulers over the Reubenites, the Gadites, and the half tribe of Manasseh, for every matter pertaining to God, and affairs of the king.

Men of valour

Reubenites

Bible References

Men of valour

1 Chronicles 26:6
And to Shemaiah his son were sons born who [were] rulers in the house of their father, for they [were] mighty warriors of ability.

Chief fathers

1 Chronicles 15:12
And he said to them, "You [are] the heads of the {families} for the Levites. Sanctify yourselves and your brothers and bring up the ark of Yahweh, the God of Israel, to [the place] I have established for it.
1 Chronicles 23:24
These [were] the sons of Levi according to the house of their fathers, the heads of the {families}, according to their enrollment, by the number of the names, according to their head count, [who were to] do the work of the service of the house of Yahweh, from twenty years old and above.
1 Chronicles 24:31
And lots were also cast [for] these, just as their brothers, the sons of Aaron, before David the king, Zadok, Ahimelech, and the heads of the {families} for the priests and for the Levites the fathers, {on the principle of the chief and younger brother alike}.

Reubenites

1 Chronicles 12:37
And from beyond the Jordan, from the Reubenites and the Gadites and the half-tribe of Manasseh, with all [their] weapons of war for battle: one hundred and twenty thousand.