It is narrated from Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "On the Day of Resurrection, the most excellent of the servants of Allah in rank will be a ruler (imam) who is just and gentle; and on the Day of Resurrection, the worst of the servants of Allah in rank in the sight of Allah will be a ruler (imam) who is oppressive and harsh."
This hadith is not narrated from Sayyiduna Umar (may Allah be pleased with him) except with this chain, and Ibn Lahi'ah (may Allah have mercy on him) is alone in narrating it.
Hadith Referenceالمعجم الأوسط / باب الألف / 348
Hadith Gradingمحدثین:إسناده حسن
Hadith Takhrij«قال الهيثمي: وفيه ابن لهيعة وحديثه حسن وفيه ضعف «مجمع الزوائد ومنبع الفوائد، ج 5، ص 197»» «أخرجه ابن حجر فى «المطالب العالية» برقم: 2150»