Quran 48:12 from Surah Al-Fath on Divine Marvels.
بَلۡ ظَنَنتُمۡ أَن لَّن يَنقَلِبَ ٱلرَّسُولُ وَٱلۡمُؤۡمِنُونَ إِلَىٰٓ أَهۡلِيهِمۡ أَبَدٗا وَزُيِّنَ ذَٰلِكَ فِي قُلُوبِكُمۡ وَظَنَنتُمۡ ظَنَّ ٱلسَّوۡءِ وَكُنتُمۡ قَوۡمَۢا بُورٗا
English translation: Nay you thought that (would) never return the Messenger and the believers to their families ever that was made fair-seeming that was made fair-seeming in your hearts And you assumed an assumption evil and you became a people ruined
Transliteration: bal zanantum an lan yanqaliba al-rasulu wal-mu'minuna ila ahlihim abadan wazuyyina dhalika fi qulubikum wazanantum zanna al-sawi wakuntum qawman buran