A.T. Robertson Commentary Matthew 26:18

"And he said, Go into the city to such a man, and say unto him, The Teacher saith, My time is at hand; I keep the passover at thy house with my disciples." — Matthew 26:18 (ASV)

To such a man (προς τον δεινα). The only instance in the N.T. of this old Attic idiom. The papyri show it for "Mr. X" and the modern Greek keeps it. Jesus may have indicated the man's name. Mark and Luke (Luke 22:10) describe him as a man bearing a pitcher of water. It may have been the home of Mary the mother of John Mark.

I keep the passover at thy house (προς σε ποιω το πασχα). Futuristic present indicative. The use of προς σε for "at thy house" is neat Greek of the classic period. Evidently there was no surprise in this home at the command of Jesus. It was a gracious privilege to serve him thus.