Sahih Muslim 5974
وَحَدَّثَنِي يُونُسُ بْنُ عَبْدِ الأَعْلَى الصَّدَفِيُّ، أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ وَهْبٍ، أَخْبَرَنِي عَمْرٌو، - وَهُوَ ابْنُ الْحَار...
Umm Salama, the wife of Allah's Apostle (ﷺ), said I used to hear from people making a mention of the Cistern, but I did not hear about it from Allah's Messenger...