We, the People of the State of South Carolina, in Convention assembled, do declare and ordain... that the union now subsisting between South Carolina and other States, under the name of "The United States of America," is hereby dissolved.
Original passage & context
"We, the People of the State of South Carolina, in Convention assembled, do declare and ordain, and it is hereby declared and ordained [...] that the union now subsisting between South Carolina and other States, under the name of "The United States of America," is hereby dissolved."
The operative act, adopted at Charleston at 1.15 p.m. — the whole of it repeals South Carolina's 1788 ratification of the Constitution and declares the Union dissolved. It names no cause; the reasons came four days later (the Declaration of Immediate Causes). The first state out. Middle repeal clause elided with an ellipsis; verified verbatim against the Wikisource transcription.
Read it in the original — Ordinance of Secession, Dec 20, 1860 ↗