6 But what says Zephaniah in the person of Christ to the disciples? Prepare yourself, be rising at the dawn: all their gleaning is destroyed: the gleaning, that is, of the Jews, with whom there is not a cluster, nay not even a gleaning of salvation left; for their vine is cut down. See how He says to the disciples, Prepare yourself, rise up at dawn: at dawn expect the Resurrection.
And farther on in the same context of Scripture He says, Therefore wait thou for Me, says the Lord, until the day of My Resurrection at the Testimony. You see that the Prophet foresaw the place also of the Resurrection, which was to be surnamed “the Testimony.” For what is the reason that this spot of Golgotha and of the Resurrection is not called, like the rest of the Churches, a Church, but a Testimony? Why, perhaps, it was because of the Prophet, who had said, until the day of My Resurrection at the Testimony.
Source: Catechetical Lectures (New Advent)