Sayyiduna al-Muttalib bin Abi Wada'ah (may Allah be pleased with him) relates: I saw the Prophet (peace and blessings be upon him) praying near the gate of Banu Sahm while people were passing in front of him (peace and blessings be upon him), and there was no sutrah between him (peace and blessings be upon him) and those people.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3481