Quran 17:90 from Surah Al-Israa on Divine Marvels.
وَقَالُواْ لَن نُّؤۡمِنَ لَكَ حَتَّىٰ تَفۡجُرَ لَنَا مِنَ ٱلۡأَرۡضِ يَنۢبُوعًا
English translation: And they say Never we will believe in you until you cause to gush forth for us from the earth a spring
Transliteration: waqalu lan nu'mina laka hatta tafjura lana mina al-ardi yanbu'an