Quran 28:11 from Surah Al-Qasas on Divine Marvels.
وَقَالَتۡ لِأُخۡتِهِۦ قُصِّيهِۖ فَبَصُرَتۡ بِهِۦ عَن جُنُبٖ وَهُمۡ لَا يَشۡعُرُونَ
English translation: And she said to his sister Follow him So she watched him from a distance while they (did) not perceive
Transliteration: waqalat li-ukh'tihi qussihi fabasurat bihi an junubin wahum la yash'uruna