Luke 22:54

And Peter followed afar off.— His love to his Master was not extinguished, yet it was exceedingly weakened; he followed, but afar off: he was here beginning to stagger; he had said that he would follow Christ, and he persuades himself that he is fulfilling his promise by thus following him afar off. St. John informs us with his usual modesty, that another disciple followed Jesus, John 18:15 who appears to have been himself; whence we may infer, that Peter and John returned quickly after their flight, or else they could not have followed at some distance, and yet be so near as to be ready to go into Caiaphas's house with him.