Khalid bin Yazid خالد بن يزيد الجمحي الإسكندراني · The Chapters on Pawning

“O Messenger of Allah (ﷺ), what are the things which are not permissible to withhold?” He said: “Water, salt and fire.” She said: “I said: 'O Messenger of Allah (ﷺ), we know what water is, but what about salt and fire?” He said: “O Humaira', whoever gives fire (to another), it is as if he has given in charity all the food that is cooked on that fire. And whoever gives salt, it is as if he has given in…