What part of the Constitution does ordain and establish come from?

The Preamble (that is, a section that "walks before" the main document) of the U.S. Constitution:

"We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America." (U.S. Const., Preamble). Emphasis added.

This essentially proclaims that it is the People of the United States that formulate and establish the Constitution. "Ordain", as in the commissioning of a cleric, suggests a reverently divine aspect of the perception of the Constitution, while "establish" suggests the permanence of a firmament that is the enduring nature of the Constitution, and of the nation it governs and describes.