Blessed Is the Man Who Trusts in Hashem

This refers to Yosef, who always trusted in Hashem and only once spoke incorrectly, when he asked the sar hamshkim to remember him – and not only did the sar hamashkim not help Yosef; Yosef was actually punished for this and had to remain imprisoned for two additional years!

Rav Yudan says that this passuk is referring to every man, not just Yosef. Woe to the person who trusts in people of high rank, for they will often betray his trust.

(Bereishis Rabbah 89:3)