[Machine] The Prophet PBUH said that Islam is built upon five pillars: the oneness of Allah, establishing prayer, giving zakat, fasting during Ramadan, and performing Hajj.  

عَنِ النَّبِيِّ ﷺ قَالَ بُنِيَ الْإِسْلَامُ عَلَى خَمْسٍ عَلَى أَنْ يُوَحَّدَ اللهُ وَإِقَامِ الصَّلَاةِ وَإِيتَاءِ الزَّكَاةِ وَصِيَامِ رَمَضَانَ وَالْحَجِّ  

[Machine] I said to Ibn Abbas, "I have a jar of sweet wine that I drink. When I drink too much of it, I join the people and attend the gathering. I am afraid of being rebuked." He said to me, "The delegation of Abd al-Qays has arrived, and they said, 'Welcome to the delegation, except for the Khazayah tribe.' They said, 'O Messenger of Allah, between us and you are the disbelieving Mudar people, and we can only come to you in the forbidden month. So we have devised a plan that we practice and invite others to do the same.' He said to them, 'I command you to have faith. Do you know what faith is?' They replied, 'It is the testimony that there is no god but Allah and that Muhammad is the Messenger of Allah, and to establish prayer, give zakat, fast in Ramadan, and perform Hajj to the Sacred House.' He said, 'And I consider it to be giving one-fifth of the spoils of war, and I forbid you from drinking from a jar, a water bag, a wooden pitcher, or a hollowed-out log.'"  

قُلْتُ لِابْنِ عَبَّاسٍ إِنَّ لِي جَرَّةَ نَبِيذٍ حُلْوٍ فَأَشْرَبُهُ فَإِذَا أَكْثَرْتُ مِنْهُ فَجَالَسْتُ الْقَوْمَ فَأَطَلْتُ الْمَجْلِسَ خِفْتُ أَنْ أَنْتَضِحَ فَقَالَ لِي قَدِمَ وَفْدُ عَبْدِ الْقَيْسِ فَقَالَ مَرْحَبًا بِالْوَفْدِ غَيْرِ الْخَزَايَا قَالُوا يَا رَسُولَ اللهِ إِنَّ بَيْنَنَا وَبَيْنَكَ كُفَّارَ مُضَرَ وَإِنَّا لَا نَصِلُ إِلَيْكَ إِلَّا فِي شَهْرٍ حَرَامٍ فَمُرْنَا بِأَمْرٍ نَعْمَلُ بِهِ وَنَدْعُو إِلَيْهِ مَنْ وَرَاءَنَا قَالَ آمُرُكُمْ بِالْإِيمَانِ تَدْرُونَ مَا الْإِيمَانُ؟ شَهَادَةُ أَنْ لَا إِلَهَ إِلَّا اللهُ وَأَنَّ مُحَمَّدًا رَسُولُ اللهِ وَأَنْ تُقِيمُوا الصَّلَاةَ وَتُؤْتُوا الزَّكَاةَ وَتَصُومُوا رَمَضَانَ وَتَحُجُّوا الْبَيْتَ الْحَرَامَ قَالَ وَأَحْسَبُهُ قَالَ وَتُعْطُوا الْخُمُسَ مِنَ الْغَنَائِمِ وَأَنْهَاكُمْ عَنِ الشُّرْبِ فِي الْجَرِّ وَالدُّبَّاءِ وَالْمُزَفَّتِ وَالنَّقِيرِ