9. (2Th 3:13). And when we do good, let us also persevere in it without fainting.
in due season—in its own proper season, God's own time (1Ti 6:15).
faint not—literally, "be relaxed." Stronger than "be not weary." Weary of well-doing refers to the will; "faint not" to relaxation of the powers [Bengel]. No one should faint, as in an earthly harvest sometimes happens.