Sunan At-Tirmidhi

Narrated Anas bin Malik: ""The inscription on the ring of the Prophet (ﷺ) was in three line: 'Muhammad' on a line, 'Messenger' on a line, 'Allah' on a line."" And Muhammad bin Yahya (one of the two who narrated to him) did not say: ""Three lines"" in his narration. There are narrations on this topic from Ibn 'Umar. [Abu 'Eisa said:] This Hadith of Anas is a Hasan Sahih Gharib