Zayd ibn Aslam reported from his father that 'Umar used to say
on the minbar, "O people! Improve your homes but be careful about these
house snakes before they make you afraid. Those
among them which are Muslim will not be clear to you and, by Allah, we
have not made peace with them since the time when we treated them as an
enemy."
'Abdullah ibn 'Amr was heard to say to a nephew of his who had
left al-Waht, "Are your workers at work?" "I don't know," he replied. He
said, "If you were clever, you would work as your workers work." Then he
turned towards us and said, "When a man works with his workers in his house
(and Abu 'Asim once said, 'in his property'), he is one of the workers
of Allah Almighty."