Matthew 3:16-17

16When Jesus had been baptized, he immediately came up out of the water. Suddenly the heavens opened up for him, and he saw the Spirit of God descending like a dove and coming to rest on him.Isa 11:2; 42:1; Mark 1:10; Luke 3:22; John 1:32-33

17Then a voice from heaven said, “This is my Son, whom I love. I am pleased with him!”Ps 2:7; Isa 42:1; Matt 12:18; 17:5; Mark 1:11; Luke 9:35; John 12:28; Eph 1:6; Col 1:13; 2Pet 1:17

Matthew 17:5

5He was still speaking when a bright cloud suddenly overshadowed them. A voice from the cloud said, “This is my Son, whom I love. I am pleased with him. Keep on listening to him!”Deut 18:15, 19; Isa 42:1; Matt 3:17; Mark 1:11; Luke 3:22; Acts 3:22-23; 2Pet 1:17

John 8:17-18

17In your own law it is written that the testimony of two people is valid.
Or true
Deut 17:6; 19:15; Matt 18:16; 2Cor 13:1; Heb 10:28
18I am testifying about myself, and the Father who sent me is testifying about me.”John 5:37

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