QS. Al-Baqarah [2:232]
Cow
وَاِذَاطَلَّقْتُمُالنِّسَاۤءَفَبَلَغْنَاَجَلَهُنَّفَلَاتَعْضُلُوْهُنَّاَنْيَّنْكِحْنَاَزْوَاجَهُنَّاِذَاتَرَاضَوْابَيْنَهُمْبِالْمَعْرُوْفِذٰلِكَيُوْعَظُبِهٖمَنْكَانَمِنْكُمْيُؤْمِنُبِاللّٰهِوَالْيَوْمِالْاٰخِرِذٰلِكُمْاَزْكٰىلَكُمْوَاَطْهَرُوَاللّٰهُيَعْلَمُوَاَنْتُمْلَاتَعْلَمُوْنَ٢٣٢
wa‑idzaa thallaqtumu alnnisaa‑a fabalaghna ajalahunna falaa ta'dhuluuhunna an yankihna azwaajahunna idzaa taraadhaw baynahum bilma'ruufi dzaalika yuu'azhu bihi man kaana minkum yu'minu billaahi waalyawmi al‑aakhiri dzaalikum azkaa lakum wa‑atharu waallaahu ya'lamu wa‑antum laa ta'lamuuna
And when you divorce women and they have fulfilled their term, do not prevent them from remarrying their [former] husbands if they agree among themselves on an acceptable basis. That is instructed to whoever of you believes in Allah and the Last Day. That is better for you and purer, and Allah knows and you know not. [232]
— Sahih International
