| Gill's Exposition of the Entire Bible And as Peter was beneath in the palace,.... Not at the lower and further end of the room, but in the lower part of it; that part in which Jesus and the sanhedrim were, being upon an advanced ground, with steps ascending to it: there cometh one of the maids of the high priest; the same that kept the door, and let him in. The Ethiopic version renders it, "a daughter of the high priest".
Vincent's Word StudiesBeneath In relation to the chambers round the court above.
Geneva Study Bible{16} And as Peter was beneath in the palace, there cometh one of the maids of the high priest: (16) A grievous example of the frailness of man together with a most comfortable example of the mercy of God, who gives the spirit of repentance and faith to his elect.
People's New Testament 14:66-72 As Peter was beneath in the palace. See notes on Mt 26:69-75. Compare Lu 22:54-62 Joh 18:15-17,25-27.
Wesley's Notes 14:66 Mt 26:69; Lu 22:56; John 18:25.
Jamieson-Fausset-Brown Bible Commentary66. And as Peter was beneath in the palace-This little word "beneath"-one of our Evangelist's graphic touches-is most important for the right understanding of what we may call the topography of the scene. We must take it in connection with Matthew's word (Mt 26:69): "Now Peter sat without in the palace"-or quadrangular court, in the center of which the fire would be burning; and crowding around and buzzing about it would be the menials and others who had been admitted within the court. At the upper end of this court, probably, would be the memorable chamber in which the trial was held-open to the court, likely, and not far from the fire (as we gather from Lu 22:61), but on a higher level; for (as our verse says) the court, with Peter in it, was "beneath" it. The ascent to the Council chamber was perhaps by a short flight of steps. If the reader will bear this explanation in mind, he will find the intensely interesting details which follow more intelligible. there cometh one of the maids of the high priest-"the damsel that kept the door" (Joh 18:17). The Jews seem to have employed women as porters of their doors (Ac 12:13).
Matthew Henry's Concise Commentary14:66-72 Peter's denying Christ began by keeping at a distance from him. Those that are shy of godliness, are far in the way to deny Christ. Those who think it dangerous to be in company with Christ's disciples, because thence they may be drawn in to suffer for him, will find it much more dangerous to be in company with his enemies, because there they may be drawn in to sin against him. When Christ was admired and flocked after, Peter readily owned him; but will own no relation to him now he is deserted and despised. Yet observe, Peter's repentance was very speedy. Let him that thinketh he standeth take heed lest he fall; and let him that has fallen think of these things, and of his own offences, and return to the Lord with weeping and supplication, seeking forgiveness, and to be raised up by the Holy Spirit. | 
