At-Tawbah 9:36 ان عدة الشهور عند الله اثنا عشر شهرا في كتاب الله يوم خلق السماوات والارض منها اربعة حرم ذالك الدين القيم فلا تظلموا فيهن انفسكم وقاتلوا المشركين كافة كما يقاتلونكم كافة واعلموا ان الله مع المتقين ٣٦

Indeed, the number of months ordained by Allah is twelve—in Allah’s Record¹ since the day He created the heavens and the earth—of which four are sacred. That is the Right Way. So do not wrong one another during these months. And fight the polytheists together as they fight together against you. And know that Allah is with those mindful ˹of Him˺.