SHAFAQNA – It is narrated from Imam Ali (AS) who said: Avoid breaking promises because it will cause the hatred of God and people towards you [1]. In another narration (Hadith) Imam Ali (AS) said: Do not make a promise if you are not certain to fulfill it [2].
[1] Nahjul Balaghah, Sobhi Saleh, Letter 53, page 444.
[2] Tasnif Qurarul Hekam wa Dorarul Kalam, Page 253, hadith 5316.