It was narrated that 'Abdullah bin 'Abbas said:
"The Messenger of Allah (ﷺ) said: 'Allah refuses to accept the good deeds of one who follows innovation until he gives up that innovation.'" (IT)
English reference (IT): Vol. 1, Book 1, Hadith 50 (IT)
Arabic reference (IT): Book 1, Hadith 52 (IT)