Sa'id bin Iyas al-Jariri سعيد بن إياس الجريري · The Book of Endowments

"Umar acquired some land at Khaibar. He came to the Prophet and consulted him about it. He said: 'I have acquired a great deal of land, and I have never acquired any wealth that is more precious to me than it. What do you command me to do with it?' He said: 'If you wish, you may freeze it and give it in charity.' So he gave it in charity on condition that it would not be sold or given…