{I will never be offended} (eg(9320)oudepote
skandalisth(8873)omai). "Made to stumble," not "offended." Volitive
future passive indicative. Peter ignored the prophecy of the
resurrection of Jesus and the promised meeting in Galilee ( 32 ).
The quotation from  Zec 13:7  made no impression on him. He was
intent on showing that he was superior to "all" the rest. Judas
had turned traitor and all were weak, Peter in particular, little
as he knew it. So Jesus has to make it plainer by pointing out
"this night" as the time ( 34 ). {Before the cock crows} (prin
alektora ph(936e)(8873)ai). No article in the Greek, "before a cock
crow." Mark ( Mr 14:30 ) says that Peter will deny Jesus thrice
before the cock crows twice. When one cock crows in the morning,
others generally follow. The three denials lasted over an hour.
Some scholars hold that chickens were not allowed in Jerusalem by
the Jews, but the Romans would have them.