Deuteronomy 7:9

Therefore know (without any doubt) and understand that the Lord your God, He is God, the faithful God, who is keeping His covenant and His (steadfast) lovingkindness to a thousand generations with those who love Him and keep His commandments.

God keeps His promises to those who love Him and keep His commandments. His faithfulness cannot be compared to anything we have in human knowledge. Our minds cannot understand how great God’s love is for His people. God’s love is the kind of love that will never leave or forsake those who believe and trust in Him.