triple headed form of the Goddess Hecate.  The Goddess is black veiled, with a moon symbol above her, and one of the Goddesses holds an athame

Hail, many-named Mother of the Gods, whose children are fair
Hail, mighty Hekate of the Threshold

Shape the course of my life with luminous Light
And make it laden with good things,
Drive sickness and evil from my limbs.
And when my soul rages about worldly things,
Deliver me purified by your soul-stirring rituals.

Yes, give me your hand I pray
And reveal to me the pathways of divine guidance that I long for,
Then shall I gaze upon that precious Light
Whence I can flee the evil of our dark origin.

Yes, give me your hand I pray,
And when I am weary bring me to the haven of piety with your winds.
Hail, many-named mother of the Gods, whose children are fair
Hail, mighty Hekate of the Threshold

~ invocation by Proclus Diadochus, 5th Century (Trns: E. Vogt, 1957)

Lovely Hecate of the roads and crossroads I invoke;
In heaven, on earth, and in the sea, saffron-cloaked,
Tomb spirit, reveling in the souls of the dead,
Daughter of Perses, haunting deserted places, delighting in dear,
Nocturnal, dog-loving, monstrous queen,
Devouring wild beasts, ungirt, of repelling countenance.
You, herder of bulls, queen and mistress of the whole world,
Leader, nymph, mountain-roaming nurturer of youth, maiden,
I beseech you to come to these holy rites,
Ever with joyous heart and ever favoring the oxherd.

~Orphic Hymn to Hecate