I prepared the journey-food for Messenger of Allah ﷺ in Abu Bakr's house when he intended to emigrate to Medina. I could not find anything to tie the food-container and the water skin with. So, I said to Abu Bakr, "By Allah, I do not find anything to tie (these things) with except my waist belt." He said, "Cut it into two pieces and tie the water-skin with one piece and the food-container with the other (the subnarrator added, "She did accordingly and that was the reason for calling her Dhatun-Nitaqain (i.e. twobelted woman)). (Using translation from Bukhārī 2979)
«صَنَعْتُ سُفْرَةً لِلنَّبِيِّ ﷺ فِي بَيْتِ أَبِي بَكْرٍ حِينَ أَرَادَ يُهَاجِرُ إِلَى الْمَدِينَةِ» قَالَتْ فَلَمْ نَجِدْ لِسُفْرَتِهِ وَلَا لِسِقَائِهِ مَا يَرْبِطُهَا بِهِ فَقُلْتُ لِأَبِي بَكْرٍ وَاللهِ مَا أَجِدُ شَيْئًا أَرْبِطَهُ إِلَّا نِطَاقِي فَقَالَ شُقِّيِهِ بِاثْنَتَيْنِ فَارْبِطِي بِوَاحِدٍ السِّقَاءَ وَبِالْآخَرِ السَّفَرَةَ «فَفَعَلَتْ فَلِذَلِكَ سُمِّيَتْ ذَاتَ النِّطَاقَيْنِ»