Direct biblical statement
Luke 1:39–41
The visitation
39 And Mary rising up in those days, went into the hill country with haste into a city of Juda.
40 And she entered into the house of Zachary and saluted Elizabeth.
41 And it came to pass that when Elizabeth heard the salutation of Mary, the infant leaped in her womb. And Elizabeth was filled with the Holy Ghost.
Douay–Rheims · Challoner revision · Luke 1:39–41
Why this matters
Mary visits Elizabeth, whose child leaps and who is filled with the Holy Spirit. The account presents the meeting as an event of divine joy, with the action of the Spirit explicitly named.