The Hospitality of Abraham

12th century
Fresco
Hermitage of St. Neophytos, Cyprus

The first word of the inscription is unclear to me. The other three words are XENíA TóN ABRAAM, "Hospitality of Abraham" -- that is, God's visit  to Abraham at Mamre in Genesis 18:1-15 (cached).

Abraham is the bearded man on the left of the large central figure. The woman is his wife Sarah. Both are bringing food to the table at which are seated the three visitors. All three have crossed haloes signifying the Deity and thus represent the Trinity.

More of Abraham

More of the Trinity

Source: Kypros.net