Genesis 2:1-3, “Thus the heavens and the earth were completed, and all their array. And in the seventh day the Mighty One completed His work which He had done, and He rested on the seventh day from all His work which He had made. And the Mighty One blessed the seventh day and set it apart, because on it He rested from all His work which the Mighty One in creating had made.”
Exodus 20:8-11, “Remember the Sabbath day, to set it apart." Six days you labour, and shall do all your work, but the seventh day is a Sabbath of יהוה your Strength. You do not do any work – you, nor your son, nor your daughter, nor your male servant, nor your female servant, nor your cattle, nor your stranger who is within your gates. For in six days יהוה made the heavens and the earth, the sea, and all that is in them, and rested the seventh day. Therefore יהוה blessed the Sabbath day and set it apart.”
Hebrews 4:1-11, "Therefore, since a promise of entering His rest remains, let us fear so that none of you should come short of it. For this message was preached to us, as well as to them; but the word which they heard did not benefit them, because they did not share in the faith of those who obeyed-- However, we who have believed do enter that rest, as He has said: So I vowed in My wrath, They will not enter into My rest, although the works were finished from the foundation of the world, For He spoke in a certain place of the Seventh Day, in this way: And YHWH rested the Seventh Day from all His works. And in this place again: If they will enter into My rest. Since therefore it remains that some must enter it, and those to whom it was first preached did not enter because of disobedience, Again, He designates a certain day, saying in David: ''Today,'' after so long a time, as it has been said: Today, if you will hear His voice, do not harden your hearts. If Yahshua (ben Nun) had given them rest he would not have spoken afterward of another day. Therefore, there remains the keeping of the Sabbath (word G#4520) to the people of YHWH, For he who has entered into His rest (word G#2663) has also ceased from his own works, as YHWH did from His. Therefore, let us be zealous to enter into that rest (word G#2663), so that no one may fall after the same example of unbelief."
“appointed times” is word #H4150 - Original Word: מוֹעֵד, Part of Speech: Noun Masculine, Transliteration: moed, Phonetic Spelling: (mo-ade'), Short Definition: meeting, Word Origin from yaad, Definition - appointed time, place, or meeting
Leviticus 23:2-4, “Speak to the children of Yisra’ĕl, and say to them, ‘The appointed times (#H4150) of יהוה, which you are to proclaim as set-apart (#H6944) gatherings (#H4744), My appointed times (#H4150), are these: Six days work is done, but the seventh day is a Sabbath (#H7676) of rest (#H7677), a set-apart #H6944) gathering (#H4744). You do no work, it is a Sabbath to יהוה in all your dwellings. These are the appointed times (#H4150) of יהוה, set-apart (#H6944) gatherings (#H4744) which you are to proclaim at their appointed times."