Kohelet Rabbah 7:18/קוהלת רבה ז׳:י״ח

1“It is good that you grasp this, and from that, too, do not withdraw your hand, for one who fears God will fulfill them all” (Ecclesiastes 7:18).“It is good that you grasp this,” this is Bible, “and from that, too, do not withdraw your hand,” this is Mishna; “for one who fears God will fulfill them all,” like Rabbi Abbahu of Caesarea.