Mo. Rev. Stat. § 10.060
The device for an armorial achievement for the state of Missouri is as follows: Arms, parted per pale, on the dexter side; gules, the white or grizzly bear of Missouri, passant guardant, proper on a chief engrailed; azure, a crescent argent; on the sinister side, argent, the arms of the United States, the whole within a band inscribed with the words "UNITED WE STAND, DIVIDED WE FALL". For the crest, over a helmet full-faced, grated with six bars; or, a cloud proper, from which ascends a star argent, and above it a constellation of twenty-three smaller stars, argent, on an azure field, surrounded by a cloud proper. Supporters on each side, a white or grizzly bear of Missouri, rampant, guardant proper, standing on a scroll, inscribed with the motto, "Salus populi suprema lex esto", and under the scroll the numerical letters MDCCCXX. And the great seal of the state shall be so engraved as to present by its impression the device of the armorial achievement aforesaid, surrounded by a scroll inscribed with the words, "THE GREAT SEAL OF THE STATE OF MISSOURI", in roman capitals, which seal shall be in a circular form and not more than two and a half inches in diameter.
§ 10.060, RSMo