Luther

He could also give you corn and fruit without your ploughing and planting, but that is not His will; neither is it His will that your ploughing and planting should produce corn and fruit; but you must plough and plant and say a blessing on your work and pray: Now help, O God; give us now corn and fruit, dear Lord; for our ploughing and planting will not yield us anything. It is Thy gift.—Exposition of Psalm cxlvii