Sayyiduna al-Muttalib bin Abi Wada'ah (may Allah be pleased with him) said: I saw the Messenger of Allah (peace and blessings be upon him) praying opposite the Black Stone, and men and women were passing in front of him, with no sutrah (barrier) between him and them.
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17820