Abu Jamrah says: I heard Ibn Abbas (may Allah be pleased with them both) say that when the delegation of Abd al-Qays came to the Messenger of Allah (peace and blessings be upon him), he (peace and blessings be upon him) asked: "Who are the people?" They said: "From Rabi'ah." He (peace and blessings be upon him) said: "Welcome to the people, without any regret." They said: "O Messenger of Allah (peace and blessings be upon him)! We are a tribe of Rabi'ah, we have come to you after great hardship, and between us and you stands the tribe of Mudar of the disbelievers, so we can reach you only in the sacred months. So give us a clear command, to which we may also invite those we have left behind, and by which we may enter Paradise." The Messenger of Allah (peace and blessings be upon him) said: "I command you to do four things and forbid you four things. I command you to believe in Allah alone. Do you know what belief in Allah is? It is to bear witness that there is no god but Allah and that Muhammad (peace and blessings be upon him) is the Messenger of Allah, to establish the prayer, to pay the zakah, to fast in Ramadan, and that you give the khumus (one-fifth) from the spoils of war. And I forbid you four things: al-dubba' (gourds), al-hantam (green glazed jars), al-naqir (hollowed-out wooden vessels) and al-muzaffat (pitch-coated vessels)" and sometimes he said the word al-muqayyar, and he said: "Remember them and invite those you have left behind to them as well."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الفيء والغنيمة / 12720