At-Talaq 65:5

<h2>The `Iddah of Those in Menopause and Those Who do not have Menses</h2><p>Allah the Exalted clarifies the waiting period of the woman in menopause. And that is the one whose menstruation has stopped due to her older age. Her `Iddah is three months instead of the three monthly cycles for those who menstruate, which is based upon the Ayah in (Surat) Al-Baqarah. see 2:228 The same for the young, who have not reached the years of menstruation. Their `Iddah is three months like those in menopause. This is the meaning of His saying;</p><p>وَاللَّـتِي لَمْ يَحِضْنَ</p><p>(and for those who have no courses...) as for His saying;</p><p>إِنِ ارْتَبْتُمْ</p><p>(if you have doubt...) There are two opinions: First, is the saying of a group of the Salaf, like Mujahid, Az-Zuhri and Ibn Zayd. That is, if they see blood and there is doubt if it was menstrual blood or not. The second, is that if you do not know the ruling in this case, then know that their `Iddah is three months. This has been reported from Sa`id bin Jubayr and it is the view preferred by Ibn Jarir. And this is the more obvious meaning. Supporting this view is what is reported from …

That is the commandment of Allah which He revealeth unto you. And whoso keepeth his duty to Allah, He will remit from him his evil deeds and magnify reward for him.

That is the Command of Allah, which He has sent down to you: and if any one fears Allah, He will remove his ills, from him, and will enlarge his reward.

That is the Command of Allah, which He has sent down to you, and whosoever fears Allah and keeps his duty to Him, He will remit his sins from him, and will enlarge his reward.

This is the ordinance of God, which He sent down to you. Whoever fears God—He will remit his sins, and will amplify his reward.