Kabbalah su Salmi 92:2

A different meaning is that "a good man" signifies the righteous. As it is written: "Say to the righteous, that it shall be well with him (or: that he is good), for they shall eat the fruit of their doings" (Yeshayah 3:10). Rabbi Yosi said that it alludes to Noah, as it is written: "Noah was a righteous man." Rabbi Yitzchak said that "a good man" alludes to the glory of the Shabbat, because the text begins with the words: "It is a good thing to give thanks to Hashem" (Tehilim 92:2).