Quran 2:50 — The Heifer (Al-Baqarah)

Recall that we parted the sea for you; we saved you and drowned Pharaoh's people before your eyes.

[2:49] Recall that we saved you from Pharaoh's people who inflicted upon you the worst persecution, slaying your sons and sparing your daughters. That was an exacting test from your Lord.

[2:51] Yet, when we summoned Moses for forty nights, you worshiped the calf in his absence, and turned wicked.*