The religion that believes in God is monotheism. Monotheistic religions worship and believe in the existence of one supreme being, often referred to as God. Examples of monotheistic religions include Christianity, Islam, and Judaism.
In Christianity, believers follow the teachings of Jesus Christ and believe in the Holy Trinity, consisting of God the Father, God the Son (Jesus Christ), and God the Holy Spirit. They believe that God created the universe and has a personal relationship with humanity.
Islam is another monotheistic religion that believes in God, who is called Allah. Muslims follow the teachings of the Prophet Muhammad as revealed in the Quran. They believe that Allah is the one and only God, and that he is merciful, just, and omnipotent.
Judaism is also a monotheistic religion that believes in God. Jews worship Yahweh, whom they believe to be the creator of the universe and the covenant God of the Jewish people. They follow the teachings and commandments of the Torah, the Hebrew Bible.
These are just a few examples of monotheistic religions that believe in God. Each religion has its own unique beliefs, practices, and interpretations, but they all share the central belief in the existence of one supreme being.
I hope this helps you. :)