Luke 24:5

The holy women, when the Angels stood beside them, are reported not to have fallen to the ground, but to have bowed their faces to the earth; nor do we read that any of the saints, at the time of our Lord's resurrection, worshipped with prostration to the ground either our Lord Himself, or the Angels who appeared to them. Hence has arisen the ecclesiastical custom, either in memory of our Lord's resurrection, or in the hope of our own, of praying on every Lord's day, and through the whole season of Pentecost, not with bended knees, but with our faces bowed to the earth. But not in the sepulchre, which is the place of the dead, was He to be sought, who rose from the dead to life. And therefore it is added, They said to them, that is, the Angels to the women, Why seek ye the living among the dead?

Let us then after the example of the devout women, whenever we approach the heavenly mysteries, because of the presence of the Angels, or from reverence to the Sacred Offering, with all humility, bow our faces to the earth, recollecting that we are but dust and ashes.

(Lib. de Inc. Fil. Dei.) He might indeed at once have raised His body from the dead. But some one would have said that He was never dead, or that death plainly had never existed in Him. And perhaps if the resurrection of our Lord had been delayed beyond the third day, the glory of incorruption had been concealed. In order therefore to show His body to be dead, He suffered the interval of one day, and on the third day manifested His body to be without corruption.

(de Con. Ev. ut sup.) We may understand that one Angel was seen by the women, as both Mark and Matthew say, so as supposing them to have entered into the sepulchre, that is, into a certain space which was fenced off by a kind of wall in front of the stone sepulchre; and that there they saw an Angel sitting on the right hand, which Mark says, but that afterwards when they looked into the place where our Lord was lying, they saw within two other Angels standing, (as Luke says,) who spoke to encourage their minds, and build up their faith. Hence it follows, And as they were afraid.