One who makes a good or bad sunna

Riyad as-Salihin (The Meadows of the Righteous)

by Imam Nawawi

19. Chapter: On the one who makes a good or bad sunna

Allah Almighty says, "Those who say, 'Our Lord, give us joy in our wives and children and make us a good example for those who have taqwa." (25:74)

and the Almighty says, "We made them leaders, guiding by Our command." (W21:72; H21:73)

171. Abu 'Amr Jarir ibn 'Abdullah said, "Once we were with the Messenger of Allah, may Allah bless him and grant him peace, at the beginning of the day when some people came, barefoot, wearing striped garments or cloaks, girded with swords. Most of them were from Mudar, indeed, all of them were from Mudar. The face of Messenger of Allah hanged because his concern at what he saw of their extreme need. He went inside and then came out and commanded Bilal to give the adhan and the iqama. He prayed and then spoke and said, 'O mankind! have taqwa of your Lord who created you from a single person' to the end of the verse, 'Allah watches over you continually.' (4:1) and the other verse which is at the end of al-Hashr, 'O you who believe! Have taqwa of Allah, and let each self look to what it has sent forward for Tomorrow.' (59:18) 'Let a man give from his dinars and his dirhams, from his clothes, from the sa' of his wheat, from the sa' of his dates, even,' he said, 'a half of a date.' A man of the Ansar brought a bag which he could barely get his hand round, indeed, he could not. Then the people came one after another until I saw two heaps of food and clothes and I saw the face of the Messenger of Allah shining as if it was illuminated. The Messenger of Allah, may Allah bless him and grant him peace, said, 'Anyone who creates a good sunna in Islam has its reward and the reward of whoever does it after him without that decreasing his reward in any way. Anyone who creates a bad sunna in Islam bears its burden and the burden of whoever acts by it after him without that decreasing his burden in any way." [Muslim]

172. Ibn Mas'ud reported that the Prophet, may Allah bless him and grant him peace, said, "No self is unjustly killed without responsibility for it falling on the elder son of Adam because he was the first to make a sunna of murder." [Agreed upon]