One who initiates a good practice or otherwise, or calls to guidance

Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "Whoever uses his tongue for the truth, so that the truth is acted upon after him, his reward continues until the Day of Resurrection, then on the Day of Resurrection Allah Almighty will give him his full reward."
Ahmad recorded it; its chain contains Ubaydullah bin Abdullah bin Mawhab, about whom Ahmad said: He is not known (or: he could not be identified). (Al-Haythami says:) I say: Ibn Mawhab's teacher is Malik bin Halik bin Harithah al-Ansari, and I have not seen anyone who has written his biography.

Sayyiduna Abu Umamah (may Allah be pleased with him) said: I heard the Prophet (peace and blessings be upon him) say: "There are four people whose rewards continue after death: a man who dies while guarding the frontier in the way of Allah; a man who teaches some knowledge, so that as long as that knowledge is acted upon, his reward continues; a man who gives an ongoing charity, so that as long as that charity continues, its reward continues for him; and a man who leaves behind a righteous child who prays for him."
Ahmad recorded it, and al-Tabarani in al-Mu'jam al-Kabir and al-Mu'jam al-Awsat. Al-Bazzar also recorded it. Its chain contains Ibn Lahi'ah and a narrator who is not named.

Sayyiduna Anas (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "There are seven things whose reward continues for a person after his death while he is in his grave: one who teaches some knowledge, or has a canal dug, or has a well dug, or plants trees, or builds a mosque, or leaves a copy of the Qur'an as inheritance, or leaves behind a child who keeps seeking forgiveness for him after his death."
Al-Bazzar recorded it; its chain contains Muhammad bin Ubaydullah al-Arzami, who is da'if (weak).

Sayyiduna Hudhayfah (may Allah be pleased with him) said: In the time of the Prophet (peace and blessings be upon him) a man asked for something, and the people gave him nothing. Then a man gave him something, and (following his example) the others also gave. The Prophet (peace and blessings be upon him) said: "Whoever initiates a good practice and that practice is then followed, he receives his own reward as well as the reward of those who followed him, without anything being reduced from their reward; and whoever initiates an evil practice which is followed, he bears his own sin as well as the sin of those who follow him, without anything being reduced from their sin."
Ahmad, al-Bazzar and al-Tabarani in al-Mu'jam al-Awsat recorded it, and its narrators are the narrators of the Sahih, except Abu Ubaydah bin Hudhayfah, whom Ibn Hibban (may Allah have mercy on him) declared thiqah (trustworthy).

Sayyiduna Abu Juhayfah (may Allah be pleased with him) said: A delegation of the tribe of Abd al-Qays came to the Prophet (peace and blessings be upon him). They were wearing striped woollen cloaks, and signs of hardship were evident on them. Seeing their condition grieved the Prophet (peace and blessings be upon him). He went into his house, then came out, ordered charity to be given and encouraged it. He (peace and blessings be upon him) said: Let one give a sa' of his wheat in charity, and let one give a sa' of his dates in charity. The narrator said: (First) a man brought a bag and set it down, then people brought things one after another, until a great deal of clothing and food had been gathered. Then the face of the Prophet (peace and blessings be upon him) began to shine, as if it were made of gold. Then he (peace and blessings be upon him) said: "Whoever initiates a good deed and it is acted upon after him, he receives the reward of that deed, and a reward like that of those who acted upon it, without anything being reduced from their reward; and whoever initiates an evil deed and it is acted upon after him, its sin will be upon him, as well as the sin of those who act upon it, without anything being reduced from their sin." (Al-Haythami says:) I say: Ibn Majah has recorded part of it.
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains Ghassan bin al-Rabi', whom Ibn Hibban declared thiqah (trustworthy), while al-Daraqutni and others declared him da'if (weak).

Sayyiduna Wathilah bin al-Asqa' (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "Whoever initiates a good practice receives its reward as long as it is acted upon, in his lifetime and after his death, until it is abandoned; and whoever initiates an evil practice, its sin remains upon him as long as it is not abandoned. Whoever dies while guarding the frontier in the way of Allah, the deed of the frontier guard continues for him until he is raised again on the Day of Resurrection."
Al-Tabarani recorded it in al-Mu'jam al-Kabir, and its narrators have been declared trustworthy.

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates that the Prophet (peace and blessings be upon him) said: "Whoever calls to guidance and that (guidance) is then followed, he receives a reward like the reward of those people, without anything being reduced from their reward; and whoever calls to misguidance, he bears a sin like the sin of those people, without anything being reduced from their sin."
Al-Tabarani recorded it in al-Mu'jam al-Kabir; its chain contains Ubaydullah bin Tammam, whom Imam Bukhari (may Allah have mercy on him) and a group (of scholars) declared da'if (weak).

Sayyiduna Abdullah bin Amr (may Allah be pleased with him) said: The son of Adam (peace be upon him) who killed his brother will share with the people of Hell half of their punishment, an exact division.
Al-Bazzar recorded it, and its narrators are the narrators of the Sahih, except that I have not seen anyone who has written a biography of al-Bazzar's teacher Abdullah bin Ishaq al-Attar; he narrates from Affan.

Bishr bin Ubaydullah, who was an old elder, said: We were with Tawus at a place, and he asked: What is this matter? A man told him: These are people whom Ibn Hisham has arrested for some offence and put iron collars around their necks. The narrator said: Then I heard Tawus narrate from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "Whoever introduces something new into this Ummah will not die until that same thing befalls him." Bishr bin Ubaydullah said: I saw Ibn Hisham when he was dismissed; the officials of al-Walid bin Abd al-Malik came and put an iron collar around Ibn Hisham's neck.
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains Bishr bin Ubaydullah, about whom Ibn Hibban said: He is munkar al-hadith (his narrations are rejected).