Luke.1.8  Now while he was serving as priest before God when his division was on duty,
Luke.17.10  So you also, when you have done all that is commanded you, say, `We are unworthy servants; we have only done what was our duty.'"
Acts.6.3  Therefore, brethren, pick out from among you seven men of good repute, full of the Spirit and of wisdom, whom we may appoint to this duty.
1Tim.4.15  Practice these duties, devote yourself to them, so that all may see your progress.
1Tim.5.4  If a widow has children or grandchildren, let them first learn their religious duty to their own family and make some return to their parents; for this is acceptable in the sight of God.
1Tim.6.2  Those who have believing masters must not be disrespectful on the ground that they are brethren; rather they must serve all the better since those who benefit by their service are believers and beloved. Teach and urge these duties.
Heb.9.6  These preparations having thus been made, the priests go continually into the outer tent, performing their ritual duties;