Who blesses Theseus and Hippolyta with a magical charm at the end of "A Midsummer Night's Dream"?

In the beginning of "A Midsummer Night's Dream," the reader is told that fairies have come from India to bless Hippolyta and Theseus on their wedding day. In act 5, after the love potion ordeal, Titania and Oberon are finally able to bestow their blessings on the couple:

TITANIA: First, rehearse your song by rote,
To each word a warbling note;
Hand in hand, with fairy grace,
Will we sing, and bless this place.(395)

OBERON: Now, until the break of day,
        Through this house each fairy stray.
        To the best bride-bed will we,
        Which by us shall blessed be;
        And the issue there create(400)

In fact, the fairies not only bless Theseus and Hippolyta, but also bestow their blessings on all the couples in the play, wishing them love and happiness, healthy children, and safety.