Ummul Momineen Zaynab bint Khuzaimah رضي الله عنها was known for her generosity towards the needy and feeding the poor people due to this, people used to call her " Ummul Masakeen" meaning "Mother of the poor"
-At Tabqat al Kubra la ibn Saad 8/115, Tarikh Tabari 11/595
Likewise Saydna Jafar ibn Abi Talib رضیﷲ عنه was known for his kindness and gentleness towards the poor people because of it he got a name "Abul Masakeen" meaning "father of the poor"
-Nazhatul baab fi Alqaab la ibn Hajar 2/273
