كتاب اللباس
Read the English translation first, with the original Arabic directly underneath.
Narrated Ibn `Abbas:
The Prophet (ﷺ) said, "Whoever has no Izar (waist sheet), can wear trousers; and whoever has no sandals, can wear Khuffs (socks made from thick fabric or leather, but cut them short below the ankles)."
مَنْ لَمْ يَكُنْ لَهُ إِزَارٌ فَلْيَلْبَسِ السَّرَاوِيلَ، وَمَنْ لَمْ يَكُنْ لَهُ نَعْلاَنِ فَلْيَلْبَسْ خُفَّيْنِ