lol... you want's scriptures... i can give you one... there's so many reference about the God reveling himself in three persons...
(this would be a long discussions) it has been discussed over and over again in this forums -
Matthew 24:36
36 “But about that day or hour no one knows, not even the angels in heaven, nor the Son,[f] but only the Father.
Now - if the Father and the Son is on One person - how come does the Son doesn't know when will He come? The Son pointed out that the Father is the One who know's His return. In these verse alone it presented that they the Father and Son are different person. Supposedly if the Father and Son are on one person - the Son should know his return - since the Father knows when... But the fact they are not on one person.. In these verse presented that they two have individual separated minds and intellect.