Al-Kāfi #163“Allah has rejected repentance of an innovator (in religion).” People asked the holy Prophet as to why is this. The holy Prophet replied,...
Thawāb al-Aʿmāl wa ʿiqāb al-Aʿmāl #1011“The Almighty Allah will not accept the repentance of a person who starts an innovation.” He was asked, “Why is it so?” He replied, “It is...