Moses Whitcomb was born 28 Apr 1742 in Rochester, Plymouth County, Massachusetts, son of Robert and Joanna. 
Sarah Powers married Moses Whitcomb in 1762 in Hardwick. 
From the History of Hardwick Massachusetts
"Moses, prob. s. of Robert (4), m. Sarah Powers 4 Nov 1762 and had Judith, b. 10 Aug 1763; Charles, b. 23 Sep 1765; Joshua, b. 18 May 1768; Calvin, bap. 17 Nov. 1776; Luther, bap. 16 Aug. 1776; Moses, bap. 18 Feb. 1781."