Tirmidhi Book 40, Hadith 2611

حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا عَبَّادُ بْنُ عَبَّادٍ الْمُهَلَّبِيُّ، عَنْ أَبِي جَمْرَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ:‏‏‏‏ قَدِمَ وَفْدُ عَبْدِ الْقَيْسِ عَلَى رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالُوا:‏‏‏‏ إِنَّا هَذَا الْحَيَّ مِنْ رَبِيعَةَ وَلَسْنَا نَصِلُ إِلَيْكَ إِلَّا فِي أَشْهُرِ الْحَرَامِ، ‏‏‏‏‏‏فَمُرْنَا بِشَيْءٍ نَأْخُذُهُ عَنْكَ وَنَدْعُو إِلَيْهِ مَنْ وَرَاءَنَا، ‏‏‏‏‏‏فَقَالَ:‏‏‏‏ آمُرُكُمْ بِأَرْبَعٍ:‏‏‏‏ الْإِيمَانِ بِاللَّهِ ثُمَّ فَسَّرَهَا لَهُمْ، ‏‏‏‏‏‏شَهَادَةُ أَنْ لَا إِلَهَ إِلَّا اللَّهُ وَأَنِّي رَسُولُ اللَّهِ، ‏‏‏‏‏‏وَإِقَامَ الصَّلَاةِ، ‏‏‏‏‏‏وَإِيتَاءَ الزَّكَاةِ، ‏‏‏‏‏‏وَأَنْ تُؤَدُّوا خُمْسَ مَا غَنِمْتُمْ .

Narrated Ibn 'Abbas: A delegation of Abdul-Qais came to the Messenger of Allah (ﷺ) and said: 'We are a tribe from Rabi'ah, and we cannot come to you except during the sacred months. So order us with something that we can take from you, and then we call those who are behind us to it.' So he said: 'I order you with four things: To testify to La Ilaha Illallah, and that I am the Messenger of Allah; to establish the Salat, to give the Zakat, and to give the Khumus from the spoils of war that you gain.'