Being Cautious of the Doubtful
On the authority of Al-Hasan bin Ali, the grandson of the messenger of Allah, who said: I memorized from the messenger of Allah his saying: “Leave that which makes you doubt for that which does not make you doubt.”
Narrated by Termithi and Nasaee, and Tirmithi said it is true and fine hadith.

Leaving that Which Does Not Concern You
On the authority of Abu Hurayrah (may Allah be pleased with him) who said: The Messenger of Allah (peace be upon him) said: “Part of the perfection of one’s Islam is his leaving that which does not concern him.”

Love for Your Brother What You Love for Yourself
On the authority of Anas bin Malik, the servant of the messenger of Allah, that the prophet said: “None of you [truely] believes until he wishes for his brother what he wishes for himself.”
Related by Bukhari and Muslim

Prohibition of Blood of a Muslim
On the authority of Abdullah Ibn Masud (may Allah be pleased with him) who said: The Messenger of Allah (peace be upon him) said: “It is not permissible to spill the blood of a Muslim except in three [instances]: the married person who commits adultery, a life for a life, and the one who forsakes his religion and separates from the community.”
Related by Bukhari and Muslim

Islamic Manners
On the authority of Abu Hurayrah (may Allah be pleased with him), that the Messenger of Allah (peace be upon him) said: “Let him who believes in Allah and the Last Day speak good, or keep silent, and let him who believes in Allah and the Last Day be generous to his neighbour, and let him who believes in Allah and the Last Day be generous to his guest.”
Related by Bukhari and Muslim

The Forbiddance of Anger
On the authority of Abu Hurairah, who said: a man said to the prophet: “Counsel me”. He said: ” Do not become angry”. The man repeated [his request] several times, and he said: “Do not become angry “.
Narrated by Bukhari

Prescription of Ihsan (Perfection)
On the authority of Abu Ya’la Shaddad bin Aws (may Allah be pleased with him), that the Messenger of Allah (peace be upon him) said: “Verily Allah has prescribed Ihsan (perfection) in all things. Thus if you kill, kill well; and if you slaughter, slaughter well. Let each one of you sharpen his blade and let him spare suffering to the animal he slaughters.”
Related by Muslim.

Follow Up a Bad Deed with a Good Deed
On the authority of Abu Dharr Jundub ibn Junadah, and Abu ‘Abd-ir-Rahman Mu’adh bin Jabal (may Allah be pleased with them) that the Messenger of Allah (peace and blessing of Allah be upon him) said: “Be conscious of Allah wherever you are. Follow the bad deed with a good one to erase it, and engage others with beautiful character.”
Tirmithi narrated the hadith and said it was fine, and in another version, said true and fine

Be Mindful of Allah and Allah will Protect You
Abu al-‘Abbas ‘Abdullah bin ‘Abbas(ra) reports: “One day I was riding (a horse/camel) behind the Prophet, peace and blessings be upon him, when he said, ‘Young man, I will teach you some words. Be mindful of God, and He will take care of you. Be mindful of Him, and you shall find Him at your side. If you ask, ask of God. If you need help, seek it from God. Know that if the whole world were to gather together in order to help you, they would not be able to help you except if God had written so. And if the whole world were to gather together in order to harm you, they would not harm you except if God had written so. The pens have been lifted, and the pages are dry.’ ”
Narrated by Termithi, who said it is true and fine hadith

In a version other than that of Tirmithi it reads “…Be mindful of Allah, you will find Him before you. Get to know Allah in prosperity and He will know you in adversity. Know that what has passed you by was not going to befall you; and that what has befallen you was not going to pass you by. And know that victory comes with patience, relief with affliction, and ease with hardship.”

Modesty is from Faith
Abu Mas’ud ‘Uqbah bin ‘Amr al-Ansari al-Badri(ra) reported that the Messenger of Allah(sas) said: “The Messenger of Allah, peace be upon him, said: ‘Among the early prophetic teachings that have reached people is this: if you do not feel shame, do what you wish.’ ”
Related by Bukhari.