It is narrated from Sayyiduna Hudhayfah bin al-Yaman (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Soon there will be rulers who will lie and oppress. Whoever affirms them in their lies and helps them in their oppression is not from me; and whoever does not affirm them in their lies and does not help them in their oppression is from me and I am from him, and he will come to me at the Pond (al-Kawthar)."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Yunus except Sahl bin Aslam."
Hadith Referenceالمعجم الأوسط / باب الميم / 8491
Hadith Takhrij«أخرجه أحمد فى «مسنده» برقم: 23732، والبزار فى «مسنده» برقم: 2834، 2831، 2832، 2833، والطبراني فى «الكبير» برقم: 3020»