Amr ibn Yahya narrated his father told him, "We used to sit at Abdullah Ibn Masood’s house before Fajr prayer. If he exited we would follow him to the musjid. Abu Musa Al-Ash’ari then came to us and asked us, ‘Did Abu Abur-Rahman (Abdullah Ibn Masood) come out yet?’ We said, ‘No’, so he sat with us till he emerged. We all stood up when he exited.
He (Abu Musa Al-Ash’ari) said, ‘O Abu Adur-Rahman, I just saw something which I did not recognize, and I did not see, all thanks to Allah, but good.’ He (Ibn Masood) said, ‘What is it?’ He (Abu Musa) said, ‘If you live you will see it. I saw in the musjid people sitting in circles waiting for the prayer. In each circle there is a leader, and they have stones in their hands. He (the leader) would say, ‘Say Takbir (Allahu Akbar) 100 times’, so they say Takbir 100 times. He (the leader) would then say, ‘Say Tahil (La Ilaha Illa Allah) 100 times’, so they say Tahil 100 times. He (the leader) would then say, ‘Say Tasbih (Subhana Allah) 100 times’, so they say Tasbih 100 times.
Ibn Masood said, ‘Did you not order them to count their evil deeds, and guarantee them that none of their good deeds will be lost?’ Then he and us left till we reached one of the circles. Then he (Ibn Masood) stood next to the circle and said, ‘What are you doing?’ They said, ‘O Abu Abdur-Rahamn, (these are) stones that we count our Takbir, Tahil, tasbih, and Tah’mid (Alhumdu’lillah).’
Ibn Masood said, ‘Count your evil deeds, for I guarantee that none of your good deeds will be lost. What is the matter with you, O nation of Muhammad? How soon you come to your destruction! The companions (of Muhammad) are still many, these are his clothes still not worn out and his cookware did not break yet. By whom my soul is in His Hands, you are either following a religion better than Muhammad’s or followers of a way of evil.’
They said, ‘By Allah, O Abu Abdur-Rahman, we sought only what is good.’ Ibn Masood said, ‘Many people seek good, but they do not reach it. The Messenger told us some people who read the Qur’an will not have the Qur’an leave their throats (to their hearts). By Allah I do not know if most of you are from them.’ Then he left them. Amr Ibn Salamah said, ‘We saw most of those people fighting against us, in the battle of Nahrawan with the Khawarij.’" (Tirmidhi)