It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Do not speak ill of the rulers; pray to Allah Almighty for their betterment, for their betterment will be your betterment."
Al-Tabarani recorded it in al-Mu'jam al-Awsat and al-Mu'jam al-Kabir from his teacher al-Husayn bin Muhammad bin Mus'ab al-Asnani; I do not know him, and the remaining narrators of this report are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الخلافة / 9270
Hadith Gradingمحدثین:إسنادہ ضعیف
Hadith Takhrij«اخرجه الطبراني فى المعجم الاوسط (1629) اخرجه الطبراني فى المعجم الكبير (7609) ، أخرجه المعجم الكبير للطبراني برقم: 7609، وأخرجه المعجم الأوسط للطبراني برقم: 1629»