You will never find one example in scripture of NT believers, including the apostles who were all Jews, after the ascension of Christ putting into practice the keeping of the Sabbath. You won't find it, it is not there, it can't be found. Keeping the Sabbath is not part of the new covenant and it is not a NT practice for believers who are in Christ, both for the Jew and the Gentile. To practice keeping the Sabbath as you do is an OT practice under the law and that is all it is and under the law it was required of the Jew to do so.
6 Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.
7 But if the ministration of death, written and engraven in stones, was glorious, so that the children of Israel could not stedfastly behold the face of Moses for the glory of his countenance; which glory was to be done away:
8 How shall not the ministration of the spirit be rather glorious?
9 For if the ministration of condemnation be glory, much more doth the ministration of righteousness exceed in glory.
10 For even that which was made glorious had no glory in this respect, by reason of the glory that excelleth.
11 For if that which is done away was glorious, much more that which remaineth is glorious.