Sayyidina Sa’ib ibn Yazid (RA) narrated : My aunt took me to the Prophet (SAW) and said, “0 Messenger of Allah, this the son of my sister is sick.” He stroked my head and prayed for me for blessing. He performed ab’ Lion and I drank the residue water. Then I stood behind him and saw the seal between his shoulders. It was like Zirril hajalah.
[Bukhari 190, Muslim 2345]