Exodus 16:21

וחם השמש ונמס AND WHEN THE SUN WAXED HOT, IT MELTED — What was left in the field (outside the inhabited camp) melted and ran in streams; the harts and the roes drank therefrom, and the nations of the world hunted them and experienced through them the taste of the Manna, and thereby understood how great was Israel’s excellency (Mekhilta). ונמס Onkelos translates by פָּשָׁר, having the same meaning as פושרים, tepid waters: through the sun it became warm and turned into tepid water; old French détemperer. An example of it (פשר) occurs in Treatise Sanhedrin at the end of the chapter that begins, ארבע מיתות‎ (Sanhedrin 67b).

וַיִּלְקְט֤וּ אֹתוֹ֙ בַּבֹּ֣קֶר בַּבֹּ֔קֶר אִ֖ישׁ כְּפִ֣י אׇכְל֑וֹ וְחַ֥ם הַשֶּׁ֖מֶשׁ וְנָמָֽס׃

And they gathered it every morning, every man according to his eating: and when the sun grew hot, it melted.