Wabisa b. Ma'bad reported God’s Messenger as saying, “Have you come to ask about righteousness and sin, Wabisa?” When he replied that he had, he joined his fingers and striking his breast with them said, “Ask yourself for a decision, ask your heart for a decision (saying it three times). Righteousness is that with which the soul is tranquil and the heart is tranquil, but sin is that which rouses suspicion in the soul and is perplexing in the breast, even if people give you a decision in its favour.”
I have retained in my memory these words of God's Messenger, “Leave what causes you doubt and turn to what does not cause you doubt. Truth is tranquility, but falsehood is doubt.”
Ahmad, Tirmidhi and Nasa’i transmitted it, and Darimi transmitted the first part.
'Atiya as-Sa'di reported God's Messenger as saying, "No one will attain to being one of the pious till he abandons things which are harmless through being on his guard against what is harmful."
Jabir reported God’s Messenger as saying, “Flesh which has grown out of what is unlawful will not enter paradise*, but hell is more fitting for all flesh which has grown out of what is unlawful.”
Ahmad, Darimi, and Baihaqi, in Shu'ab al-iman, transmitted it.
*The reference here is to people who live on unlawful source of income.
