عَنْ عَلِيٍّ رَضِيَ اللَّهُ عَنْهُ قَالَ جَاءَ رَجُلٌ إِلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَقَالَ إِنِّي نَذَرْتُ أَنْ أَنْحَرَ نَاقَتِي وَكَيْتَ وَكَيْتَ قَالَ أَمَّا نَاقَتُكَ فَانْحَرْهَا وَأَمَّا كَيْتَ وَكَيْتَ فَمِنَ الشَّيْطَانِ
It is narrated from Sayyiduna Ali (may Allah be pleased with him) that a man came to the Noble Prophet (peace and blessings be upon him) and said: I have made a vow to slaughter my she-camel and to do such and such things. The Prophet (peace and blessings be upon him) said: As for your she-camel, slaughter it, and as for such and such things, they are from Satan.