Introduction:
Rahab, a Canaanite woman residing in Jericho, is a significant figure in biblical history due to her remarkable declaration of faith in the God of Israel. Her account is primarily found in the Book of Joshua, where she plays a crucial role in the Israelite conquest of Jericho. Despite her background as a prostitute, Rahab's faith and actions earn her a place in the lineage of Jesus Christ and commendation in the New Testament.

Biblical Account:
The narrative of Rahab is introduced in Joshua 2. As the Israelites prepare to enter the Promised Land, Joshua sends two spies to scout Jericho. The spies enter the city and lodge at the house of Rahab. When the king of Jericho learns of their presence, he demands Rahab to surrender the spies. However, Rahab hides the men and deceives the king's messengers, claiming the spies had already left the city.

Rahab's declaration of faith is articulated in Joshua 2:9-11 : "I know that the LORD has given you this land and that the fear of you has fallen upon us, so that all who dwell in the land are melting in fear of you. For we have heard how the LORD dried up the waters of the Red Sea before you when you came out of Egypt, and what you did to Sihon and Og, the two kings of the Amorites across the Jordan, whom you completely destroyed. When we heard this, our hearts melted and everyone's courage failed because of you, for the LORD your God is God in heaven above and on earth below."

Theological Significance:
Rahab's declaration is profound for several reasons. Firstly, it demonstrates her recognition of the sovereignty and power of the God of Israel, despite her pagan background. Her acknowledgment that "the LORD your God is God in heaven above and on earth below" signifies a pivotal moment of faith, where she aligns herself with the God of Israel over the gods of her own people.

Secondly, Rahab's faith is not merely intellectual assent but is accompanied by action. By hiding the spies and helping them escape, she risks her own life, showing that her faith is genuine and transformative. Her actions exemplify the principle found in James 2:25 , which states, "In the same way, was not even Rahab the prostitute justified by her actions when she welcomed the spies and sent them off on another route?"

Legacy and New Testament References:
Rahab's faith and actions have a lasting legacy in the biblical narrative. She is mentioned in the genealogy of Jesus Christ in Matthew 1:5, highlighting her inclusion in the messianic line. This inclusion underscores the theme of God's grace and redemption, as Rahab, a Gentile and former prostitute, becomes an ancestor of the Savior.

In Hebrews 11:31 , Rahab is commended for her faith: "By faith the prostitute Rahab, because she welcomed the spies in peace, did not perish with those who were disobedient." Her account serves as a testament to the power of faith and God's willingness to accept and use those who turn to Him, regardless of their past.

Conclusion:
Rahab's declaration of faith is a powerful example of belief in action. Her account illustrates the transformative power of faith and God's inclusive grace, as she moves from a life of sin to a place of honor in the history of salvation. Her legacy continues to inspire believers to trust in God's sovereignty and to act courageously in faith.