From Sahih Bukhari (Hadith 5388):
Narrated Wahb bin Kaisan:The People of Sham taunted `Abdullah bin Az-Zubair by calling him "The son of Dhatin-Nataqain" (the woman who has two waist-belts). (His mother) (Asma, said to him, "O my son! They taunt you with "Nataqain". Do you know what the Nataqain were? That was my waist-belt which I divided in two parts. I tied the water skin of Allah's Messenger (ﷺ) with one part, and with the other part I tied his food container
Reference: Bukhari 5388