Surah Al-A'raf (The Heights), Verse 134

وَلَمَّا وَقَعَ عَلَیْهِمُ الرِّجْزُ قَالُوْا یٰمُوْسَی ادْعُ لَنَا رَبَّكَ بِمَا عَهِدَ عِنْدَكَ لَىِٕنْ كَشَفْتَ عَنَّا الرِّجْزَ لَنُؤْمِنَنَّ لَكَ وَلَنُرْسِلَنَّ مَعَكَ بَنِیْۤ اِسْرَآءِیْلَ ۟

Wa lammaa waqa'a 'alaihimur rijzu qaaloo ya Moosad-u lanaa rabbaka bimaa 'ahida 'indaka la'in kashafta 'annar rijza lanu 'minanna laka wa lanursilanna ma'aka Banee Israaa'eel

“Every time the penalty fell on them, they said: "O Moses! on our behalf call on thy Lord in virtue of his promise to thee: If thou wilt remove the penalty from us, we shall truly believe in thee, and we shall send away the Children of Israel with thee."”

Quran 7:134 (Yusuf Ali Translation)