'Feebly' in the Bible

Even youths grow weary and tired,And vigorous young men stumble badly,

He will not let a crushed stem be quite broken, and he will not let a feebly burning light be put out: he will go on sending out the true word to the peoples.

Who sends out the war-carriages and the horses, the army with all its force; they have come down, they will not get up again; like a feebly burning light they are put out.