(55) باب هَلْ يُجْعَلُ نَقْشُ الْخَاتَمِ ثَلاَثَةَ أَسْطُرٍ
Narrated Anas:
that when Abu Bakr became the Caliph, he wrote a letter to him (and stamped it with the Prophet's ring) and the engraving of the ring was in three lines: Muhammad in one line, 'Apostle' in another line, and 'Allah' in a third line. (FR)
Reference (FR): Sahih al-Bukhari 5878 (FR)
In-book reference (FR): Book 77, Hadith 95 (FR)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 72, Hadith 767 (FR)