Urwah bin al-Zubayr (may Allah have mercy on him) says: I came to Abdullah bin Umar (may Allah be pleased with them both) and said: O Abu Abdur-Rahman, we sit with these rulers of ours and they speak words while we know that the truth is other than it, yet we affirm them; we strengthen them and praise them, and they pass unjust judgements. What is your view about this? He said: O my nephew, in the time of the Messenger of Allah (peace and blessings be upon him) we used to consider this hypocrisy; I do not know what you consider it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قتال أهل البغي / 16670