'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. (ID)
English reference (ID): Book 11, Hadith 1349 (ID)
Arabic reference (ID): Book 11, Hadith 1323 (ID)