Here are three prayers about work from the Book of Common Prayer (pages 261, 259, 261) appropriate for any time, including Labor Day.
Almighty God our heavenly Father, you declare your glory and show forth your handiwork in the heavens and in the earth: Deliver us in our various occupations from the service of self alone, that we may do the work you give us to do in truth and beauty and for the common good; for the sake of him who came among us as one who serves, your Son Jesus Christ our Lord, who lives and reigns with you and the Holy Spirit, one God, for ever and ever. Amen.
Almighty God, whose Son Jesus Christ in his earthly life shared our toil and hallowed our labor: Be present with your people where they work; make those who carry on the industries and commerce of this land responsive to your will; and give to us all a pride in what we do, and a just return for our labor; through Jesus Christ our Lord, who lives and reigns with you and the Holy Spirit, one God, now and for ever. Amen.
Almighty God, you have so linked our lives one with another that all we do affects, for good or ill, all other lives: So guide us in the work we do, that we may do it not for self alone, but for the common good; and, as we seek a proper return
for our own labor, make us mindful of the rightful aspirations of other workers,
and arouse our concern for those who are out of work; through Jesus Christ our Lord, who lives and reigns with you and the Holy Spirit, one God, for ever and ever. Amen.
The Rev. Frederick Erickson, a retired university professor,