Mishnah, Pirkei Avot 5:1

By ten acts of speech was the world made. And what does Scripture mean [by having G-d say "say" ten times]? And is it not so that with a single act of speech [the world] could have been brought into being? But it is to exact punishment from the wicked, who destroy a world which was created through ten acts of speech, and to secure a reward for the righteous, who sustain a world which was created through ten acts of speech. [Translation by Jacob Neusner]