SHAFAQNA – Imam Sadeq (AS) said: Do not call any one as friend until you test them in 3 things: See them at the time of anger and see if the anger takes them out of the way of truth and justice or not; test them in financial and economic cases, with money; and test them at the time of traveling together [1].
[1] Beharul Anwaar, Vol. 74, page 180.