It was narrated that Mus'ab bin Sa'd said: "Sa'd had many grapevines and he had someone looking after them for him. (The vines) bore many grapes, and that man wrote to him (saying): 'I am afraid that the grapes will be wasted; what do you think if I squeeze them to make juice? Sa'd wrote to him (saying): 'When this letter of mine reaches you, leave my land, for by Allah I cannot trust you with anything ever agin.' So he made him leave his land."