2 Samuel 15:7

7 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.

2 Samuel 15:7 In-Context

5 And it was so, that when any man came nigh to him to do him obeisance, he put forth his hand, and took him, and kissed him.
6 And on this manner did Absalom to all Israel that came to the king for judgment: so Absalom stole the hearts of the men of Israel.
7 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.
8 For thy servant vowed a vow while I abode at Geshur in Syria, saying, If the LORD shall bring me again indeed to Jerusalem, then I will serve the LORD.
9 And the king said unto him, Go in peace. So he arose, and went to Hebron.
The King James Version is in the public domain.