(9) باب اسْمِ اللَّهِ الأَعْظَمِ
It was narrated from Asma' bint Yazid that :
the Messenger of Allah (saas) said: "The Greatest Name of Allah is in these two Verses: And your Ilah (God) is One Ilah (God - Allah), La Ilaha Illa Huwa (none has the right to be worshipped but He), the Most Gracious, the Most Merciful.' And at the beginning of Surah Al 'Imran."
Reference: Sunan Ibn Majah 3855
In-book reference: Book 34, Hadith 29
English translation: Vol. 5, Book 34, Hadith 3855