Musannaf Ibn Abi Shaybah 39368 — Reports on the emigration

Sayyidah Asma' (may Allah be pleased with her) relates: When he (peace and blessings be upon him) decided to emigrate to Madinah, I prepared a provision bag for him (peace and blessings be upon him) in the house of Sayyiduna Abu Bakr (may Allah be pleased with him). She relates: We could not find anything with which to tie the provision bag and the water skin of the Prophet (peace and blessings be upon him). I said to Sayyiduna Abu Bakr: By Allah, I find nothing to tie them with (rope or the like) except my waistband. She said: Sayyiduna Abu Bakr al-Siddiq said: Tear it (the waistband) into two parts. Tie the water skin with one and the provision bag with the other. For this reason Sayyidah Asma' became known by the name Dhat al-Nitaqayn.