הָרִֽאשֹׁנוֹת֙ מֵאָ֣ז הִגַּ֔דְתִּי וּמִפִּ֥י יָצְא֖וּ וְאַשְׁמִיעֵ֑ם פִּתְאֹ֥ם עָשִׂ֖יתִי וַתָּבֹֽאנָה׃
Das Frühere habe ich von jeher verkündet und aus meinem Munde ging es hervor und ich tat es kund, plötzlich führe ich es aus und es trifft ein.
Rashi on Isaiah
The first things that passed, [viz.] the redemption from Egypt and Hezekiah’s salvation from the hand of Sennacherib.
Ibn Ezra on Isaiah
I have declared, etc. God will say to the unbelievers, Have I not often foretold you coming events before they happened (ראשנות)?1Comp. I. E. on 46:9 and note 6, and on 41:27 and note 35. The past tense is therefore used : and they came to pass.
Rashi on Isaiah
I told from then When they had not yet come about, and suddenly I did it.