Is the fourth commandment repeated in the New Testament? The answer is both yes and no. The "no" is easy: the phrase "remember the sabbath day" is not used in the New Testament. On the other hand, one example of the way in which the fourth commandment is persent is that the command to labor is found in a variety of post-ascension sections of the New Testament. For example:
2 Thessalonians 3:8-12
Neither did we eat any man's bread for nought; but wrought with labour and travail night and day, that we might not be chargeable to any of you: not because we have not power, but to make ourselves an ensample unto you to follow us. For even when we were with you, this we commanded you, that if any would not work, neither should he eat. For we hear that there are some which walk among you disorderly, working not at all, but are busybodies. Now them that are such we command and exhort by our Lord Jesus Christ, that with quietness they work, and eat their own bread.
1 Thessalonians 4:9-12
But as touching brotherly love ye need not that I write unto you: for ye yourselves are taught of God to love one another. And indeed ye do it toward all the brethren which are in all Macedonia: but we beseech you, brethren, that ye increase more and more; and that ye study to be quiet, and to do your own business, and to work with your own hands, as we commanded you; that ye may walk honestly toward them that are without, and that ye may have lack of nothing.
Let him that stole steal no more: but rather let him labour, working with his hands the thing which is good, that he may have to give to him that needeth.
I have coveted no man's silver, or gold, or apparel. Yea, ye yourselves know, that these hands have ministered unto my necessities, and to them that were with me. I have shewed you all things, how that so labouring ye ought to support the weak, and to remember the words of the Lord Jesus, how he said, It is more blessed to give than to receive.
1 Corinthians 4:11-13
Even unto this present hour we both hunger, and thirst, and are naked, and are buffeted, and have no certain dwellingplace; and labour, working with our own hands: being reviled, we bless; being persecuted, we suffer it: being defamed, we intreat: we are made as the filth of the world, and are the offscouring of all things unto this day.