Of this principle Joseph Smith said: “The time has at last arrived when the God of Abraham, of Isaac, and of Jacob, has set his hand again the second time to recover the remnants of his people, which have been left from Assyria, and from Egypt, and from Pathros, and from Cush, and from Elam, and from Shinar, and from Hamath, and from the islands of the sea, and with them to bring in the fulness of the Gentiles, and establish that covenant with them, which was promised when their sins should be taken away. See Isaiah 11; Romans 11:25, 26 and 27, and also Jeremiah 31:31, 32 and 33.
This covenant has never been established with the house of Israel, nor with the house of Judah, for it requires two parties to make a covenant, and those two parties must be agreed, or no covenant can be made.” (Teachings, p. 14.) This covenant to which the Prophet refers is made in the waters of baptism, that being the ordinance ordained by God whereby sins are remitted and we first take upon ourselves the name of Christ.