The Prophet [SAW] said: "If the strap of the sandal of one of you breaks, let him not walk in one sandal until he fixes it." (Using translation from Nasāʾī 5369)
عَنِ النَّبِيِّ ﷺ قَالَ «إِذَا انْقَطَعَ شِسْعُ نَعْلِ أَحَدِكُمْ فَلَا يَمْشِ فِي نَعْلٍ وَاحِدَةٍ حَتَّى يُصْلِحَهَا»