Where the story is told
The story is found in Surah al-Baqarah, verses 67 to 73 (Quran 2:67-73). It is one of the accounts in the surah that remind the Children of Israel (Bani Israil) of Allah's favours and of how they responded to them.
Musa (Moses) is the messenger who speaks to his people in these verses. Each time they ask something, the verses report that they said "call upon your Lord for us" and Musa then conveyed Allah's answer.