Ata' bin Abi Rabah عطاء بن أبي رباح · The Book of ar-Ruqba

"I heard 'Amr bin Dinar, narrating from Tawus, from Hujr Al-Madari, from Zaid bin Thabit, that the Messenger of Allah said: "'Umra (a gift given for life) belongs to the heir." And Allah knows best."