(192) بَابُ الشَّحْنَاءِ
Abu Hurayra reported that the Messenger of Allah, may Allah blesshim and grant him peace, said, "The gates of the Garden are opened on Mondaysand Thursdays. Every person who does not associate anything with Allahis forgiven except for someone who has enmity between existing betweenhim and another man. It is said, 'Leave these two until they make peace.'"
Reference: Al-Adab Al-Mufrad 411
In-book reference: Book 22, Hadith 15
English translation: Book 22, Hadith 411