And I heard the Prophet (peace and blessings be upon him) say that a man should not touch his naked body with another man, and a woman should not touch her naked body with another woman. Abu Az-Zubair says that I asked Sayyiduna Jabir (may Allah be pleased with him), "Do you people consider sins to be shirk?" He replied, "Allah's refuge (from this)."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 15184
Hadith Gradingحکم دارالسلام:صحيح لغيره، وأبو الزبير لم يصرح بسماعه من جابر ، وانظر: 14836