2:226
لِلَّذِيۡنَ يُؤۡلُوۡنَ مِنۡ نِّسَآئِهِمۡ تَرَبُّصُ اَرۡبَعَةِ اَشۡهُرٍۚ فَاِنۡ فَآءُوۡ فَاِنَّ اللّٰهَ غَفُوۡرٌ رَّحِيۡمٌ
For those who swear not to have sexual relations with their wives is a waiting time of four months, but if they return [to normal relations] - then indeed, Allah is Forgiving and Merciful