Sayyiduna Abu Dharr (may Allah be pleased with him) relates that the Prophet (peace and blessings be upon him) said to me: "O Abu Dharr! I see you as weak, and I love for you what I love for myself. Do not become a leader even over two people, and do not take charge of an orphan's wealth."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5346