Zadhan narrates: Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) drank while standing, and people were watching him. The people were surprised at this, so Sayyiduna Ali (may Allah be pleased with him) said: "What are these people looking at? If I drink while standing, I have seen the Prophet (peace and blessings be upon him) drinking while standing; and if I drink while sitting, I have also seen the Prophet (peace and blessings be upon him) drinking while sitting." (Allamah al-Haythami says:) I say: in the Sahih, only the part about drinking while standing is mentioned.
Imam Ahmad recorded this narration. Its chain contains Ata' bin al-Sa'ib, who suffered from confusion (ikhtilat). The remaining narrators of this narration are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأشربة / 8244
Hadith Gradingمحدثین:إسناده ضعیف
Hadith Takhrij«اخرجه احمد فى المسند (795) ، أخرجه مسند أحمد برقم: 797، 918»