Matthew 26:35

‘Peter says to him, “Even if I must die with you, yet will I not deny you.” Likewise also said all the disciples.'

But at this stage this was unknown to Peter. He had yet to know himself. And so he refutes Jesus and declares that whatever happens, even if it means dying with Him, he will not deny Jesus. And the other disciples all said the same thing, that is, that they would not deny Him either. We may ask, could God not have sustained them and seen them through this time of trouble? But we must remember two things. Firstly that they slept in the Garden when they should have been praying. They had their opportunity to build up their spiritual strength and spurned it. But even more importantly that that was a night like no other night since the world began. It was in fact necessary for Jesus to face the ultimate alone. No one could be seen as having any part in that, and none could share it with Him. It was necessary for it to be seen as the ultimate sacrifice of Jesus alone, because He alone could make that sacrifice (Isaiah 59:16), an experience that would lead to the new covenant through which His Spirit would come (Isaiah 59:21).