All these were the sons of Heman the king’s seer in the words of God, to lift up the horn. And God gave to Heman fourteen sons and three daughters. (1 Chronicles 25:5)
A well-known Hebrew metaphor meaning to exalt a person or to increase his power (see 1 Sam. 2:10; Ps. 89:17; 92:10). Thus the meaning here would seem to be that the Lord had exalted Heman by giving him 14 sons and 3 daughters.