"And between the waters that were above the firmament; and it was so" (Genesis 1:7). The Holy One, blessed be He, said to the wicked: I created the world, concerning which is written "and it was so [vayehi ken]," yet you say "it is not so [lo ken]." I say "it is not so" and you say "so." By your lives! "Not so [lo ken] are the wicked, but they are like chaff; therefore the wicked shall not stand [literally: rise, yakumu] in judgment" (Psalms 1:4-5). And is that good for them [that they shall not rise]? Rather, it is like a person who says, "So-and-so stood up in court [lost his case]," where he had no rising of the foot [i.e., the loser has no standing, no leg to stand on].
When God Says It Stands and the Wicked Say It Falls
Yalkut Shimoni on Torah 5:12
וּבֵין הַמַּיִם אֲשֶׁר מֵעַל לָרָקִיעַ וַיְהִי כֵן, אָמַר הַקָּדוֹשׁ בָּרוּךְ הוּא לָרְשָׁעִים, אֲנִי בָּרָאתִי אֶת הָעוֹלָם, שֶׁנֶּאֱמַר בּוֹ וַיְהִי כֵן וְאַתֶּם אוֹמְרִים לֹא כֵן אֲנִי אוֹמֵר לֹא כֵן וְאַתֶּם אוֹמְרִים כֵּן חַיֵּיכֶם "לֹא כֵן הָרְשָׁעִים כִּי אִם כַּמֹּץ עַל כֵּן לֹא יָקֻמוּ רְשָׁעִים בַּמִּשְׁפָּט". וְהָא טָב לְהוֹן, אֶלָּא כְּאֲנַשׁ דְּאָמַר קָם פְּלוֹנִי בְּדִינָא וְלֹא הֲוֵי לֵיהּ הֲקָמַת רֶגֶל.