Doubtless you have heard the arguments about the God of the Bible being a Trinity (Triune) God.
Some folks argue that this means the God of the Bible is 3 different Gods.
Others correctly say that God is One God with 3 aspects (Father, Son-Jesus, and the Holy Spirit.)
Many places in the Bible speak to this truth including this passage in the Book of Ephesians:
There is one body and one SPIRIT,
even as you are called in one hope of your calling:
One LORD, one faith, one baptism,
One God and FATHER of all,
who is above all, and through all, and in you all .
A short devotional based on that verse in Ephesians explains.