לְךָ֣ י֭וֹם אַף־לְךָ֥ לָ֑יְלָה אַתָּ֥ה הֲ֝כִינ֗וֹתָ מָא֥וֹר וָשָֽׁמֶשׁ׃
Thine is the day, Thine also the night; Thou hast established luminary and sun.
Rashi on Psalms
even night is Yours And they were with You in the darkness of the night.
Rashi on Psalms
You established the luminary and the sun You established the light of the Torah for them.