narrated on the authority 'Abdullah b. Mas'ud that the Messenger of God observed: Never a Prophet had been sent before me by God towards his nation who had not among his people (his) disciples and companions who followed his ways and obeyed his command. Then there came after them their successors who said whatever they did not practise, and practised whatever they were not commanded to do. He who strove against them with his hand was a believer: he who strove against them with his tongue was a believer, and he who strove against them with his heart was a believer and beyond that there is no faith even to the extent of a mustard seed. Abu Rafi' said: I narrated this hadith to 'Abdullah b. 'Umar; he contradicted me. There happened to come 'Abdullah b. Mas'ud who stayed at Qanat, and 'Abdullah b 'Umar wanted me to accompany him for visiting him (as 'Abdullah b. Mas'ud was ailing), so I went along with him and as we sat (before him) I asked Ibn Mas'ud about this hadith. He narrated it in the same way as I narrated it to Ibn 'Umar. The same hadith has been transmitted by another chain of narrators on the authority of 'Abdullah b. Mas'ud who observed: Never was there one among the prophets who had had not disciples who followed his direction and followed his ways. The remaining part of the hadith is like that as narrated by Salih but the arrival of Ibn Mas'ud and the meeting of Ibn 'Umar with him is not mentioned.

—Sahih Muslim1:81, 1:82