Exodus 17:15
And Moses built an altar, and called the name of it Jehovahnissi:
Torrey's Topical Textbook—AKJV

Exodus 24:4
And Moses wrote all the words of the LORD, and rose up early in the morning, and built an altar under the hill, and twelve pillars, according to the twelve tribes of Israel.
Torrey's Topical Textbook—AKJV