It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "When one of you is invited and he comes along with the messenger (of the one who invited him), that is his permission (to enter)."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Qatadah (may Allah have mercy on him), from Khilas (may Allah have mercy on him), mujawwad (with a complete chain) except Shu'ayb bin Ishaq (may Allah have mercy on him), and Sulayman bin Abd al-Rahman (may Allah have mercy on him) is alone in narrating it from him."
Hadith Referenceالمعجم الأوسط / باب الميم / 6630
Hadith Takhrij«أخرجه أبو داود فى «سننه» برقم: 5190، والبيهقي فى «السنن الكبرى» برقم: 17750، وأحمد فى «مسنده» برقم: 11048، والطحاوي فى «شرح مشكل الآثار» برقم: 1587»