Thawāb al-Aʿmāl wa ʿiqāb al-Aʿmāl > Punishment of cursing a person who does not deserve it
Hadith #1

أَبِی ره قَالَ حَدَّثَنِی سَعْدُ بْنُ عَبْدِ اللَّهِ عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ الْوَشَّاءِ عَنْ عَلِیِّ بْنِ أَبِی حَمْزَهَ قَالَ سَمِعْتُ أَبَا عَبْدِ اللَّهِ ع یَقُولُ إِنَّ اللَّعْنَهَ إِذَا خَرَجَتْ مِنْ فَمِ صَاحِبِهَا تَرَدَّدَتْ فَإِنْ وَجَدَتْ مَسَاغاً وَ إِلَّا رَجَعَتْ عَلَی صَاحِبِهَا.

1. It is narrated that Imam Ja’far Sadiq (a.s.) said, “Whenever a person curses, this curse travels till it gets a person who is worthy of it. If it does not get such a person, it returns to its source.”