"And the voice of the shofar" (Exodus 19:19) — the Mekhilta declares that this is a propitious sign in all of Scripture. Wherever the shofar is mentioned in the Hebrew Bible, it signals something good for Israel. The shofar is never an omen of doom for the Jewish people. It is always a herald of blessing, deliverance, or divine intervention on their behalf.
The Mekhilta brings three proof texts spanning different books and different eras, all pointing to the same conclusion. First, (Psalms 47:6): "God has risen with teruah; the Lord, with the sound of the shofar." The teruah — the staccato blast of the shofar — accompanies God's ascent, a moment of divine triumph that redounds to Israel's benefit.
Second, (Isaiah 27:13): "And it shall be on that day, it shall be sounded by a great shofar." This verse looks forward to the future ingathering of the exiles, when a great shofar will sound and the scattered remnants of Israel will return from the lands where they have been dispersed. The shofar here announces the ultimate redemption — the end of exile and the restoration of the nation.
Third, (Zechariah 9:14): "And the Lord God will blow the shofar, and will go in a tempest against Teiman (Edom)." In this vision, God Himself blows the shofar as He moves to defeat Israel's enemies. The sound of the shofar accompanies divine warfare on Israel's behalf.
The Mekhilta's teaching transforms the shofar from a mere instrument into a theological symbol. Every blast — whether at Sinai, in the Psalms, in prophetic visions of the future, or on Rosh Hashanah (the Jewish New Year) — carries the same message: God is acting for Israel. When Israel hears the shofar, they know that deliverance is at hand.