Numbers 21:34 New International Version (NIV)
34 The Lord said to Moses, “Do not be afraid of him, for I have delivered him into your hands, along with his whole army and his land. Do to him what you did to Sihon king of the Amorites, who reigned in Heshbon.”
God assured Moses that Israel’s enemies were conquered even before the battle. You can have assurance in your life. God wants to give you victory over your battles which are problems related to sin. Believe he can help you. Trust him to help you. Take the steps he shows you. Walk with God.