Midrash su Proverbi 25:18

Rabbi Ḥanina bar Pappa began: “A battering ram, a sword, and a sharp arrow…” (Proverbs 25:18). “A battering ram [mefitz]” – as in, “the Lord will scatter you [vehefitzḥa] among all the peoples” (Deuteronomy 28:64); “a sword” – as in, “I will unsheathe the sword after you” (Leviticus 26:33); “and a sharp arrow” – as in, “when I send the [evil] arrows of famine” (Ezekiel 5:16). All this for whom? For “a man who bears false witness against his friend” (Proverbs 25:18) – that is Israel, who responded and said: “This is your God, Israel” (Exodus 32:4). “A loose tooth and an unsteady foot…” (Proverbs 25:19) – Israel said before the Holy One blessed be He: Master of the universe, when You came to shepherd us, our tooth consumed and crushed others. Why then is the grazing tooth consuming us and the foot is trampling us? It is due to the confidence [we placed] in idolatry, because we betrayed our Rock.⁴⁰This is based on the continuation of the verse cited above: “Is trust in a traitor on a day of trouble” (Proverbs 25:19). “As one who removes a garment on a cold [kara] day” (Proverbs 25:20) – “and it was that when He called [kara] and they did not listen” (Zechariah 7:13).
Another matter: “[Confidence in an unfaithful man in a time of trouble is like] a loose tooth and an unsteady foot” (Proverbs 25:19) – a tooth that undermines and a foot that gives way. The Holy One blessed be He said: I said to Israel: ‘Betray idol worship and put your trust in Me,’ but they did not do so; rather, they betrayed Me and put their trust in idol worship. That is what is written: “They say to wood: You are my father” (Jeremiah 2:27). When they sinned they were exiled. When they were exiled, Jeremiah began lamenting over them, eikha.