The Hebrew verb yasad (יָסַד) means to found, establish, or lay a foundation. It carries the idea of setting something firm and secure from the ground up. It appears approximately 41 times in the Old Testament.
In Scripture, yasad describes God's creative acts — He laid the foundations of the earth (Psalm 102:25; Isaiah 48:13) — and human construction projects like Solomon's temple (1 Kings 6:37). Theologically, the word points to God's sovereign ordering of creation. The Psalmists marvel that God founded the mountains and sea (Psalm 24:2). Isaiah's servant songs speak of one whom God has founded for a purpose — a concept applied to the Messiah. In the New Testament, Jesus declares that the wise man builds on rock (the foundation metaphor), and Paul writes that no one can lay a foundation other than Jesus Christ (1 Corinthians 3:11). Every building in Scripture points back to the One who is the ultimate Foundation.