Some time after His resurrection, Jesus returned to the Father:

“After he [Jesus] said this, he was taken up before their very eyes, and a cloud hid him from their sight.”
—Acts 1:9.

Just before His ascension, what promise did Jesus make to His followers?

“Do not let your hearts be troubled. Trust in God; trust also in me. In my Father's house are many rooms; if it were not so, I would have told you. I am going there TO PREPARE A PLACE FOR YOU. And if I go and prepare a place for you, I will come back and take you to be with me that you also may be where I am.”
—John 14:1-3.