Malik bin Dinar(radiAllahu anhu) said:
“The heart will get ruined if it does not grieve (for its sins), similar to a house which gets ruined when there is no one residing in it.”
[Al-Baihaqi in Shu’ab al-Imam 864 (2/270)]
[Al-Baihaqi in Shu’ab al-Imam 864 (2/270)]