Mountains: Ebal
Source: TTT
Deuteronomy 11:29
When the LORD your God brings you into the land you are entering to possess, you are to proclaim the blessing on Mount Gerizim and the curse on Mount Ebal.
Deuteronomy 27:13
And these tribes shall stand on Mount Ebal to deliver the curse: Reuben, Gad, Asher, Zebulun, Dan, and Naphtali.