Quran 23:25 from Surah Al-Muminoon on Divine Marvels.
إِنۡ هُوَ إِلَّا رَجُلُۢ بِهِۦ جِنَّةٞ فَتَرَبَّصُواْ بِهِۦ حَتَّىٰ حِينٖ
English translation: Not he (is) but a man in him (is) madness so wait concerning him until a time
Transliteration: in huwa illa rajulun bihi jinnatun fatarabbasu bihi hatta hinin