The most likely author of Deuteronomy 7:9 is Moses, according to evangelical Christian perspective. Moses is traditionally considered the author of the first five books of the Bible, also known as the Pentateuch, which includes Deuteronomy. Evangelical Christians believe that Moses was chosen by God to lead the Israelites out of slavery in Egypt and to receive the law and commandments from God at Mount Sinai.

In Deuteronomy 7:9, Moses speaks on behalf of God, emphasizing the faithfulness and covenantal love of God towards the Israelites. The verse states, “Know therefore that the Lord your God is God, the faithful God who keeps covenant and steadfast love with those who love him and keep his commandments, to a thousand generations.”

From an evangelical Christian perspective, this verse highlights the unchanging nature of God’s love and his commitment to his people, which is a significant theme throughout the entire Bible. Evangelicals believe that the words spoken by Moses in Deuteronomy 7:9 are inspired by God and are applicable to all believers, demonstrating the enduring nature of God’s love and faithfulness towards his people.