Barang siapa bernadzar untuk taat kepada Allah, hendaklah ia menunaikannya. Barang siapa bernadzar untuk maksiat, janganlah ia menunaikannya
Imam Ahmad : 18431حَدَّثَنَا سُفْيَانُ عَنْ مُجَالِدٍ عَنِ الشَّعْبِيِّ عَنْ جَرِيرٍ قَالَ بَايَعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَلَى إِقَامِ الصَّلَاةِ وَإِيتَاءِ الزَّكَاةِ وَالسَّمْعِ وَالطَّاعَةِ وَالنُّصْحِ لِكُلِّ مُسْلِمٍ
Narrated to us [Sufyan] from [Mujalid] from [Asy Sya'bi] from [Jarir] he said: I pledged bai'at (allegiance) to the Messenger of Allah Peace be upon him to (consistently) establish prayer, pay zakat, always listen and obey, and always give sincerity to every Muslim.