Matthew 6:34

Mὴ οὖν μεριμνήσητε εἰς τὴν αὔριον· ἡ γὰρ αὔριον μεριμνήσει τὰ ἑαυτῆς. ἀρκετὸν τῇ ἡμέρᾳ ἡ κακία αὐτῆς.

Therefore do not worry about tomorrow, for tomorrow has its own worry. Each day has enough trouble of its own.