Hazrat Wadi’ah Ansari narrates that he says Hazrat Umar (may Allah be pleased with him) said: Do not concern yourself with matters that do not pertain to your purpose. And keep away from your enemy. Among people, fear everyone except your trustworthy friends, and a trustworthy person is one who fears Allah. Do not associate with a wicked person, lest you learn his wickedness. And do not disclose your secrets to him, and in your affairs, consult those who fear Allah Almighty.