1 Samuel 16:11; 1 Samuel 16:19

11 And Samuel said to Jesse, "Are these all the children?" And he said, "There remains yet the youngest, and behold, he is tending the sheep." Then Samuel said to Jesse, "Send and bring him; for we will not sit down until he comes here."

19 So Saul sent messengers to Jesse and said, "Send me your son David who is with the flock."