Bede

. And it happened as Saul completed speaking to David, etc. When the Savior, through the apostles, completed spreading the gifts of his incarnation by preaching in Judea, many indeed, having heard the word, believed. But the more perfect ones among these, overflowing with spiritual grace, which, as has often been said, is designated by the name Jonathan, were so bonded to him with such love that they did not hesitate to give their lives for him. …

Commentary on Samuel ↗