وَالنِّفَاسُ هُوَ الدَّمُ الْخَارِجُ عَقِبَ الْوِلَادَةِ، وَأَكْثَرُهُ أَرْبَعُونَ يَوْمًا وَلَا حَدَّ لِأَقَلِّهِ
Nifas is blood following childbirth. It has no minimum duration. Its maximum possible duration is 40 days; blood beyond the maximum is not Nifas. In women with an established habit, detailed allocation when bleeding exceeds the maximum requires habit rules and should not be reduced to the statement 'the first 40 days are always Nifas.'