וְאֹ֣רַח צַ֭דִּיקִים כְּא֣וֹר נֹ֑גַהּ הוֹלֵ֥ךְ וָ֝א֗וֹר עַד־נְכ֥וֹן הַיּֽוֹם׃
Rashi on Proverbs
But the way of the righteous is like the light of dawn which shines and illuminates from the first ray of dawn.
Rashi on Proverbs
until the day is perfect Until midday, which is the brightest time of day.