Deuteronomy 4:2 Ye shall not add unto the word which I command you, neither shall ye diminish ought from it, that ye may keep the commandments of Elohim your Yahweh which I command you.
Deuteronomy 4:40 Thou shalt keep therefore his statutes, and his commandments, which I command thee this day, that it may go well with thee, and with thy children after thee, and that thou mayest prolong thy days upon the earth, which the Elohim thy YAH giveth thee, for ever.
5 In the fourteenth day of the first month at even is the LORD’S Passover. 6 And on the fifteenth day of the same month is the feast of unleavened bread unto the Messiah: seven days ye must eat unleavened bread. 7 In the first day ye shall have a Set Apart convocation: ye shall do no servile work therein.
Numbers 9:14 – And if a stranger shall sojourn among you, and will keep the Passover unto the Messiah; according to the ordinance of the Passover, and according to the manner thereof, so shall he do: ye shall have one ordinance, both for the stranger, and for him that was born in the land.