Article 2, Section 2, Clause 1
Massachusetts Constitution of 1780, PT. 2, CH. 2, SEC. 1, ART. 8Thorpe 3:1901--2
VIII. The power of pardoning offences, except such as persons may be convicted of before the senate by an impeachment of the house, shall be in the governor, by and with the advice of council; but no charter of pardon, granted by the governor, with advice of the council before conviction, shall avail the party pleading the same, notwithstanding any general or particular expressions contained therein, descriptive of the offence or offences intended to be pardoned.
The Founders' Constitution
Volume 4, Article 2, Section 2, Clause 1, Document 19
The University of Chicago Press
Thorpe, Francis Newton, ed. The Federal and State Constitutions, Colonial Charters, and Other Organic Laws of the States, Territories, and Colonies Now or Heretofore Forming the United States of America. 7 vols. Washington, D.C.: Government Printing Office, 1909.