Is Trinity doctrine in Christianity true? Lets discuss it here

New Information: Wow i realise i was a friggin idiot.. Greek bible lol. Old Testament is in Hebrew originally. Here is reference to it here. Just ignore the part where i read Greek bible of Old Testament

Isaiah 48:15-17 Hebrew
https://biblehub.com/text/isaiah/48-15.htm
https://biblehub.com/text/isaiah/48-16.htm
https://biblehub.com/text/isaiah/48-17.htm

Sources i have of Isaiah 48:15-17
Bible NIV https://www.biblegateway.com/passage/?search=Isaiah+48%3A15-17&version=NIV

Old Information:
Greek
https://biblehub.com/interlinear/isaiah/48-15.htm
https://biblehub.com/interlinear/isaiah/48-16.htm
https://biblehub.com/interlinear/isaiah/48-17.htm