It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "A man should not be in (uncovered bodily) contact with a man, nor should a woman be in (uncovered bodily) contact with a woman."
Imam al-Tabarani (may Allah have mercy on him) said: "Only Hisham narrated this hadith from Ibn Sirin, and only Abu Bakr from Hisham; Ahmad bin Yunus is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 5855
Hadith Takhrij«أخرجه أحمد فى «مسنده» برقم: 8434، 10601، والبزار فى «مسنده» برقم: 10074، والطحاوي فى «شرح مشكل الآثار» برقم: 3258، والطبراني فى «الصغير» برقم: 653»