Hashem Silences the Angels at the Yam Suf
As the Egyptians drown in the Yam Suf, the angels want to sing shirah, but Hashem stops them: 'My creations are drowning and you sing?'
י״ז
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The Gemara says that the angels wished to recite shirah while the Egyptians were drowning in the Yam Suf but Hashem stopped them. Hashem said, “My creations are drowning in the sea and you are reciting shirah?” Just as the angels did not recite shirah on the seventh day of Pesach (at night), we also do not recite Hallel on the seventh day.