When the Egyptians were drowning in the Red Sea, the angels in heaven began to break forth in songs of jubilation, but the Holy One, blessed be He, silenced them: “My creatures are perishing — and ye are ready to sing!”

The Talmud (AD 200-500) Collection of Jewish rabbinical writings

(Unreferenced)

In Louis I. Newman, comp. The Talmudic Anthology, 103 (1945): "When the Egyptians were drowning, the angels wished to sing. But God said, 'My children are dying, and you would sing?'"