Surah Al-Baqara, Verse 226
لِّلَّذِينَ يُؤْلُونَ مِن نِّسَآئِهِمْ تَرَبُّصُ أَرْبَعَةِ أَشْهُرٍۢ ۖ فَإِن فَآءُو فَإِنَّ ٱللَّهَ غَفُورٌۭ رَّحِيمٌۭ
Translation — Sahih International
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.
Source
Kur'an-ı Kerim, Bakara Suresi 2:226
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/2-suresi-226-ayet