Hadith 502410
Chapter 5: Jumu'a - كتاب الجمعة
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، أَنَّهُ بَلَغَهُ أَنَّ رَسُولَ اللَّهِ قَالَ " مَا عَلَى أَحَدِكُمْ لَوِ اتَّخَذَ ثَوْبَيْنِ لِجُمُعَتِهِ سِوَى ثَوْبَىْ مَهْنَتِهِ " .
Yahya related to me from Malik from Yahya ibn Said that he had heard that the Messenger of Allah, may Allah bless him and grant him peace, said, "There is nothing wrong in wearing two garments which are not work-clothes for jumua."
Reference Muwatta Malik 502410
USC-MSA web (English) reference : Book 5, Hadith 18