In the bible as the inspired and infallible Word of God,
2 tim. 3:15-16

In one God, eternally existent in three persons: father,son
,and Holy Spirit, Deut. 6:4, Matt. 28:19 Mark 12:29

In the virgin birth of christ,his death , bodily resurrection
,and ascension. Isa. 7:14 Rom. 8:34 Acts. 1:10

In salvation through the blood of Christ 1 John 5:10
Rom. 10:13-15

In water baptism by immersion, Matt. 28:19

In divine healing through the redemptive work of Christ on
the cross Isa. 53:4; Matt. 8:16-17; Jas. 5:13-14

In the baptism with the Holy Spirit with the initial evidence
of  speaking in other tongues , Acts 2:4; 10:44-46; 15:8-9

In the sanctifying power of the Holy Spirit, who enables a
believer to live holy, Heb. 12:14 1 Pet.1 15-16

In the second coming of Jesus Christ, Acts 24:14; Luke
14:14; Rev. 19;7-9