Quran 72:16 from Surah Al-Jinn on Divine Marvels.
وَأَلَّوِ ٱسۡتَقَٰمُواْ عَلَى ٱلطَّرِيقَةِ لَأَسۡقَيۡنَٰهُم مَّآءً غَدَقٗا
English translation: And if they had remained on the Way surely We (would) have given them to drink water (in) abundance
Transliteration: wa-allawi is'taqamu ala al-tariqati la-asqaynahum maan ghadaqan