مختصر صحيح مسلم
Mukhtasar Sahih Muslim
Issues of Prayer
Praying in a single garment.
Narrated from Sayyiduna Abu Huraira (may Allah be pleased with him) that a man asked the Messenger of Allah (peace and blessings of Allah be upon him), "Is it permissible to pray in a single garment?" So the Prophet (peace and blessings of Allah be upon him) said, "Does each one of you have two garments?"