رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 757
The Book About the Etiquette of Eating
Etiquette of Drinking Water
وَعَنْ اِبْنِ عَبَّاسٍ رضى اَللَّهُ عَنْهُمَا قَالَ: قَالَ رَسُولُ اَللَّهِ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ: لَا تَشْرَبُوا وَاحِدًا كَشُرْبِ الْبَعِيرِ، وَلَكِنِ اشْرَبُوا مَثنى وثُلاثَ، وَسَمُّوا إِذَا أَنْتُمْ شَرِبْتُمْ،وَاحْمَدُوا إِذَا أَنْتُمْ رفعتُم .((رَوَاهُ التِّرْمِذِيّ))
Ibn 'Abbas (May Allah be pleased with them) reported: The Messenger of Allah (ﷺ) said, "Do not drink in one gulp like a camel, but in two or three (gulps). Mention the Name of Allah (i.e., say Bismillah) when you start drinking and praise Him (i.e., say Al-hamdu lillah) after you have finished (drinking)." [At- Tirmidhi].
Riyad as-Salihin, 757