Article 1, Section 8, Clause 3 (Indians)
Document 3
Records of the Federal Convention
[2:321; Journal, 18 Aug.]
To regulate affairs with the Indians as well within as without the limits of the United States
[2:367; Journal, 22 Aug.]
at the end of the 2nd clause, 2 sect. 7 article add
"and with Indians, within the Limits of any State, not subject to the laws thereof"
[2:569; Committee of Style]
To regulate commerce with foreign nations, and among the several States; and with the Indian tribes.
The Founders' Constitution
Volume 2, Article 1, Section 8, Clause 3 (Indians), Document 3
http://press-pubs.uchicago.edu/founders/documents/a1_8_3_indianss3.html
The University of Chicago Press
Farrand, Max, ed. The Records of the Federal Convention of 1787. Rev. ed. 4 vols. New Haven and London: Yale University Press, 1937.