Jesus did not prooftext. I assume that by Prooftext you mean making a new meaning by taking only the part of the text out of context.
Jesus did not do that, based on Luke 4, for the first temptation of converting Stone to bread using the power of God, Jesus answered - “It is written, ‘MAN SHALL NOT LIVE ON BREAD ALONE.’” He did not say the rest like 'but every word that comes from the Mouth of God'. But that does not matter here as it answers the Devil clearly that Jesus was not focused on getting Bread from God.
For the second temptation of Worshiping the Satan by loving the worldly things, Jesus said -‘YOU SHALL WORSHIP THE LORD YOUR GOD AND SERVE HIM ONLY.’” I think this sentence is complete and answers Satan clearly.
The Third Temptation is :-
“If You are the Son of God, throw Yourself down from here; for it is written,
‘HE WILL COMMAND HIS ANGELS CONCERNING YOU TO GUARD YOU,’
and,
‘ON their HANDS THEY WILL BEAR YOU UP,
SO THAT YOU WILL NOT STRIKE YOUR FOOT AGAINST A STONE.’”
Here Satan has correctly Quoted Psalms 91:11. Nothing wrong in what Satan has quoted here. But Jesus balanced it by saying, 'YOU SHALL NOT PUT THE LORD YOUR GOD TO THE TEST'. (Deuteronomy 6:16). I believe is is also complete, Jesus did not bring a new meaning to Deuteronomy 6:16.
If a believer just takes one scripture and makes a doctrine out of it then he would have fallen for the Satan when he asked to Jump. It is true that God will Guard us but that does not mean that we will put it to test. Same thing can be applied to new Covenant life as well. It is true that we have eternal life but one should walk according to Spirit not according to Flesh.
A best example of Proof text is Romans 8:1-
Therefore there is now no condemnation for those who are in Christ Jesus.
Many people use it to coverup their sinful life styles, but that is not true. The word says clearly that Those who are in Christ Jesus, who are these people who are in Christ?
Romans 8:4-
so that the requirement of the Law might be fulfilled in us, who do not walk according to the flesh but according to the Spirit.
Who fulfill the requirements of Law by walking with the spirit without yielding to Flesh.