1 Chronicles 11:15

Now three of the thirty captains— In 2 Samuel 23:13 three of the thirty chief. There were thirty-seven heads or chiefs, if we reckon all; and but seven if we reckon only those who were most honourable, and to whom also the name ראשׁ rash, head, or chief, is peculiarly attributed. The Hebrew words in Samuel rendered in the time of harvest, never have that signification throughout the Bible: the verse there should be translated, three captains went down who were over the thirty, and came to the rock to David, into the cave Adullam, &c. Kennicott.