Quran 20:85 from Surah Taa-Haa on Divine Marvels.
قَالَ فَإِنَّا قَدۡ فَتَنَّا قَوۡمَكَ مِنۢ بَعۡدِكَ وَأَضَلَّهُمُ ٱلسَّامِرِيُّ
English translation: He said But indeed, We [verily] We (have) tried your people after you after you and has led them astray the Samiri
Transliteration: qala fa-inna qad fatanna qawmaka min ba'dika wa-adallahumu al-samiriyu