The Philistines followed hard after Saul and his sons, and they killed Saul’s sons Jonathan, Abinadab, and Malchishua.
Jewish Publication Society of America Version (JPS1917) - 1 Samuel 31:2 >And the Philistines followed hard upon Saul and upon his sons; and the Philistines slew Jonathan, and Abinadab, and Malchishua, the sons of Saul.