These are the second and third of the three times that Peter denies Jesus. (For the details of the first time Peter denies Jesus, see Servant Girl). Luke 22 adds more color to the second and third times Peter denies Jesus:

Luke 22:58-62  58 And after a little while another saw him and said, “You also are of them.” But Peter said, “Man, I am not!” 59 Then after about an hour had passed, another confidently affirmed, saying, “Surely this fellow also was with Him, for he is a Galilean.” 60 But Peter said, “Man, I do not know what you are saying!” Immediately, while he was still speaking, the rooster crowed. 61 And the Lord turned and looked at Peter. Then Peter remembered the word of the Lord, how He had said to him, “Before the rooster crows, you will deny Me three times.” 62 So Peter went out and wept bitterly.

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