Al-Kāfi - Volume 3 > Women’s Hayd (menses) Stops, Comes Again and the Time of Menopause
Hadith #4

4ـ مُحَمَّدُ بْنُ إِسْمَاعِيلَ عَنِ الْفَضْلِ بْنِ شَاذَانَ عَنْ صَفْوَانَ بْنِ يَحْيَى عَنْ عَبْدِ الرَّحْمَنِ بْنِ الْحَجَّاجِ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) قَالَ حَدُّ الَّتِي قَدْ يَئِسَتْ مِنَ الْمَحِيضِ خَمْسُونَ سَنَةً.

4. Muhammad ibn ’Isma‘il has narrated from al-Fadl ibn Shadhan from Safwan ibn Yahya from ‘Abd al-Rahman ibn al-Hajjaj who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said, ‘Menopause happens at the age of fifty years.”’