'A'idh bin 'Amro al-Muzani (RAA) narrated that The Messenger of Allah (ﷺ) said:
"Islam is always superior and should never be surpassed." Related by Ad-Daraqutni. (RU)
English reference (RU): Book 11, Hadith 1349 (RU)
Arabic reference (RU): Book 11, Hadith 1323 (RU)