23. And—omitted in the oldest manuscripts (compare Eph 6:7, 8). Compare the same principle in the case of all men, Hezekiah (2Ch 31:21; Ro 12:11).
do, do it—two distinct Greek verbs, "Whatsoever ye do, work at it" (or "labor at" it).
heartily—not from servile constraint, but with hearty good will.