This day, etc. - memorable saying! Salvation already come, but not a day old.
to this house - so expressed probably to meet the taunt, “He is gone to be guest,” etc. The house is no longer polluted; it is now fit to receive Me. But salvation to a house is an exceedingly precious idea, expressing the new air that would henceforth breathe in it, and the new impulses from its head which would reach its members (Psa 118:15; Act 16:15, Act 16:16, Act 16:31).
son of Abraham - He was that by birth, but here it means a partaker of his faith, being mentioned as the sufficient explanation of salvation having come to him.