Psalms (Author Moses, David, Solomon, Asaph, Heman, Ethan, sons of Korah, compiled by Ezra)
141:5Let the righteous smite me, it is kindness; and let him reprove me, it is an excellent oil which my head shall not refuse: for yet my prayer also is for them in their calamities.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.