Revelation, 30 December 1830 [D&C 37]

40th Commandment AD 1830
A Revelation to Sidney [Rigdon] & Joseph at at time that they  went from Fayette to Canandaigua to translate &c  given at Canandaigua Ontario County State of New York
A Commandment to sidney & Joseph saying Behold I say  unto ye that it is not Expedient in me that ye should  Translate any more until ye shall go to the Ohio & this  because of the enemy & for your sakes & again I say unto  you that ye shall not go untill ye have Preached my  Gospel in those parts & have strengthened up the Church  whithersoever it is found & more especially in Colesville  for Behold they pray unto me in much faith & again  a commandment I give unto the Church that it is  expedient in me that they should assemble together at  the Ohio by <against> the time that my Servent Oliver [Cowdery] shall  return unto them Behold here is wisdom & let evry  man Choose for himself until I come amen even so amen [p. 49]
A revelation in September 1830 first proclaimed a central gathering of church members in one place. With continuing opposition in New York and word of growing numbers of members in Ohio, a move to Ohio seemed attractive. This revelation was the first of two (see also Revelation, 2 January 1831 [D&C 38]) that instructed JS and other members to assemble in Ohio.
John Whitmer copied this text into Revelation Book 1 as “40th Commandment AD 1830” sometime between March and June 1831. The 1833 Book of Commandments dates this revelation to December 1830, giving the location as Canandaigua, New York, as does the 1835 Doctrine and Covenants.