It is ALL OVER the new testament, dude! It's what the WHOLE NEW TESTAMENT IS ABOUT!
Then it shouldn't be hard to find one mention of "personal relationship with Christ." (Please note the quotation marks.)
Jesus commands us to love God with our whole heart and mind and to love our neighbor as ourselves. We are also to "pray constantly." If that's what you mean by "personal relationship with Christ," then I'm with you.
Those with eyes, let them see.