in domo Patris mei mansiones multae sunt si quo minus dixissem vobis quia vado parare vobis locum
In the NKJV, this is:
"In My Father's house are many mansions; if it were not so, I would have told you. I go to prepare a place for you."
Both of these translations exhibit alliteration (in the phrases "mansiones multae" and "many mansions"), and the repetition involved in this effect lends a slight sense of this large amount.