I couldn’t find any restatement or quote of the Ezekiel passage in the NT. My Bible gives pretty good cross references and there was not one that led to a NT quote.
There are passages that show the OSAS (once saved always saved) teaching is wrong - that one can come to Christ and then lose salvation. Here are a few that show that it is possible for those who have come to Christ to fall away if they do not persevere.
*Mt. 13:18 "Hear then the parable of the sower.
13:19 When any one hears the word of the kingdom and does not understand it, the evil one comes and snatches away what is *sown in his heart; this is what was sown along the path.
13:20 As for what was sown on rocky ground, this is he who hears the word and immediately receives it with joy; 13:21 yet he has no root in himself, but endures for a while, and when tribulation or persecution arises on account of the word, immediately he falls away.
1 Cor 9:27 (St. Paul speaking) but I pommel my body and subdue it, lest after preaching to others I myself should be disqualified.
Gal 4:8-9,11 Formerly, when you did not know God, you were in bondage to beings that by nature are no gods; but now that you have come to know God, or rather to be known by God, how can you turn back again to the weak and beggarly elemental spirits, who slaves you want to be once more. …I am afraid I have labored over you in vain.
Gal 5:4 You are severed from Christ, you who would be justified by the law; you have fallen away from grace. (Altho the specific context is Christians who return to OT practices, it definitely shows that it is possible to have received grace and then to lose it.)
Gal 5:19-21 Now the works of the flesh are plain: fornication, impurity, licentiousness, idolatry, sorcery, enmity, strife, jealousy, anger, selfishness, dissension, party spirit, envy, drunkenness, carousing, and the like. I warn you, (these are Christians Paul is speaking to) as I warned you before, that those who do such things shall not inherit the kingdom of God.
2 Tim 4:4 and will turn away from listening to the truth and wander into myths.
Heb 2:1 Therefore we must pay the closer attention to what we have heard, lest we drift away from it.
2 Pet 2:20 For if, after they have escaped the defilements of the world through the knowledge of our Lord and Savior Jesus Crist, they are again entangled in them and overpowered, the last state has become worse for them than the first. For it would have been better for them never to have known the way of righteousness than after knowing it to turn back from the holy commandment delivered to them.
2 Pet 3:17 You therefore, beloved, knowing this beforehand, beware lest you be carried away with the error of lawless men and lose your own stability.
I did not look for passages showing that sinners can convert and be forgiven since I don’t think that’s an issue with other Christian denominations.
Nita