And we know the Father did not need to save Jesus from the cross itself
John 12:27 Now is my soul troubled; and what shall I say? Father, save me from this hour: but for this cause came I unto this hour.
Jesus just prayed unto him who was the one "able" to save him from death.
"O my Father, if it be possible, let this cup pass from me: nevertheless not as I will, but as thou wilt" Mat 26:39
Mat 26:32 He went away again the second time, and prayed, saying,
"O my Father, if this cup may not pass away from me, except I drink it, thy will be done"
It even says,
Luke 22:43 And there appeared an angel unto him from heaven, strengthening him.
Luke 22:44 And being in an agony he prayed more earnestly: and his sweat was as it were great drops of blood falling down to the ground.
Heb 5:7-8 Who in the days of his flesh, when he had offered up prayers and supplications with strong crying and tears unto him that was able to save him from death, and was heard in that he feared; Though he were a Son, yet learned he obedience by the things which he suffered
That last line I am not convinced of what that means in respects to Jesus obedience, unless it has something to do with things similar to this (and not doing that).
Mat 26:53 Thinkest thou that I cannot now pray to my Father, and he shall presently give me more than twelve legions of angels?
Mat 26:54 But how then shall the scriptures be fulfilled, that thus it must be?
Isaiah 53:10 Yet it pleased the LORD to bruise him; he hath put him to grief: when thou shalt make his soul an offering for sin, he shall see his seed, he shall prolong his days, and the pleasure of the LORD shall prosper in his hand.
Isaiah 53:11 He shall see of the travail of his soul, and shall be satisfied: by his knowledge shall my righteous servant justify many; for he shall bear their iniquities.
Isaiah 53:12 Therefore will I divide him a portion with the great, and he shall divide the spoil with the strong; because he hath poured out his soul unto death: and he was numbered with the transgressors; and he bare the sin of many, and made intercession for the transgressors.
Then the back end of it here
Isaiah 55:3 Incline your ear, and come unto me: hear, and your soul shall live; and I will make an everlasting covenant with you, even the sure mercies of David.
Acts 13:34 And as concerning that he raised him up from the dead, now no more to return to corruption, he said on this wise, I will give you the sure mercies of David.
Acts 13:35 Wherefore he saith also in another psalm (Psalm 16:10), Thou shalt not suffer thine Holy One to see corruption.
Acts 13:38 Be it known unto you therefore, men and brethren, that through this man is preached unto you the forgiveness of sins:
Heb 13:20 Now the God of peace, that brought again from the dead our Lord Jesus, that great shepherd of the sheep, through the blood of the everlasting covenant,
Col 1:14 In whom we have redemption through his blood, even the forgiveness of sins:
1Peter 1:3 Blessed be the God and Father of our Lord Jesus Christ, which according to his abundant mercy hath begotten us again unto a lively hope by the resurrection of Jesus Christ from the dead,
Rev 1:5 And from Jesus Christ, who is the faithful witness, and the first begotten of the dead, and the prince of the kings of the earth. Unto him that loved us, and washed us from our sins in his own blood,
2Ti 1:9 Who hath saved us, and called us with an holy calling, not according to our works, but according to his own purpose and grace, which was given us in Christ Jesus before the world began,
2Ti 1:10 But is now made manifest by the appearing of our Saviour Jesus Christ, who hath abolished death, and hath brought life and immortality to light through the gospel:
This part here, as far as I can see seems to be the Father speaking to the Son,
Isaiah 55:3 Incline your ear, and come unto me: hear, and your soul shall live; and I will make an everlasting covenant with you, even the sure mercies of David.
Seems to go with Acts 13:34 (in the above). Am I catching that correctly?
In the the days of his flesh Jesus cries out to the one who is able to save him from death (The Father did not) Jesus was obedient unto death (on a cross) in his days of his flesh on earth, but from death after the fact.
Acts 13:33 God hath fulfilled the same unto us their children, in that he hath raised up Jesus again; as it is also written in the second psalm, Thou art my Son, this day have I begotten thee. (Which day speaks of his being raised from the dead, or firstborn of the dead as it relates to his priesthood, Hebrews 5:5)
I'm probably way off topic again, but sometimes things just trial off a little.