Rashi, on Ps 74:4

“The earth is melted, and all that dwell therein: I have established the pillars thereof.”

“When the earth and all its inhabitants were melting away, etc. On the day of the giving of the Torah, when the earth and all its inhabitants were melting away because of the condition You made with the Creation: that if Israel did not accept the Torah, you would return it [the earth] to void and chaos. I Your people, Israel. established its pillars when I said, “We will do and we will hear.””

Imported from an open dataset — not yet checked against the printed edition.