EXOD223 Bar Kappara expounded: Greater is the "Creation" of the righteous [i.e., what is created by them] than the creation of heaven and earth. For in respect to the latter it is written (Isaiah 48:13): "My hand [singular], too, has founded the earth," whereas in relation to the "creation" of the righteous [i.e., the sanctuary] it is written: "the sanctuary, O Lord, which Your hands [plural] have established" (Kethuvoth 5a)