1 Chronicles 2:13-17

and Jesse became the father of Eliab his firstborn, then Abinadab the second, Shimea the third, Nethanel the fourth, Raddai the fifth, Ozem the sixth, David the seventh; and their sisters were Zeruiah and Abigail. And the three sons of Zeruiah were Abshai, Joab and Asahel. Abigail bore Amasa, and the father of Amasa was Jether the Ishmaelite.