After four years had passed, Absalom said to the king, “Please let me go to Hebron to fulfill a vow I have made to the LORD.
Jewish Publication Society of America Version (JPS1917) - 2 Samuel 15:7 >And it came to pass at the end of forty years, that Absalom said unto the king: 'I pray thee, let me go and pay my vow, which I have vowed unto the LORD, in Hebron.