Remember that the psalmist said in Psalm 105 that the land promise was based on God’s oath, not on Israel’s performance. As Paul stated, “The law, introduced 430 years later, does not set aside the covenant previously established by God and thus do away with the promise.” (Galatians 3:17) In other words, the conditions of the Sinai covenant do not undo God’s unconditional promises to the patriarchs.