It is narrated from Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Do not keep staring at those afflicted with leprosy."
Imam al-Tabarani (may Allah have mercy on him) said: "This hadith is narrated from Sayyiduna Mu'adh (may Allah be pleased with him) only with this chain, and Sulayman bin Abd al-Rahman is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الواو / 9263
Hadith Takhrij«أخرجه الطبراني فى «الكبير» برقم: 222»