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.
KJV
And it came to pass after 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.
ASV
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 Jehovah, in Hebron.