" 'But the priests, who are Levites and descendants of Zadok and who faithfully carried out the duties of my sanctuary when the Israelites went astray from me, are to come near to minister before me; they are to stand before me to offer sacrifices of fat and blood, declares the Sovereign LORD." (Eze. 44:15).
"And it shall come to pass, that every one that is left of all the nations that came against Jerusalem shall go up from year to year to worship the King, the Lord of hosts, and to keep the feast of tabernacles. And it shall be, that whoso of the families of the earth goeth not up unto Jerusalem to worship the King, the Lord of hosts, upon them there shall be no rain. And if the family of Egypt go not up, and come not, they shall have no overflow; there shall be the plague, wherewith the Lord will smite the nations that go not up to keep the feast of tabernacles. This shall be the punishment of Egypt, and the punishment of all the nations that go not up to keep the feast of tabernacles." Zechariah 14.16-19.
"Moses wrote down this Teaching and gave it to the priests, sons of Levi, who carried the Ark of the Lord's Covenant, and to the elders of Israel. And Moses instructed them as follows: Every seventh year, the year set for remission, at the Feast of Booths, when all Israel comes to appear before the Lord your God in the place which He will choose, you shall read this Teaching aloud in the presence of all Israel. Gather the people--men, women, children, and the strangers in your communities--that they may hear and so learn to revere the Lord your God and to observe faithfully every word of the Teaching. Their children, too, who have not had the experience, shall hear and learn to revere the Lord your God as long as they live in the land which you are about to cross the Jordan to occupy." Deuteronomy 31.9-13.
"And it shall come to pass, that from one new moon to another, and from one sabbath to another, shall all flesh come to worship before me, saith the Lord," (Isa. 66:23).
"6 And foreigners who bind themselves to the LORD to serve him, to love the name of the LORD, and to worship him, all who keep the Sabbath without desecrating it and who hold fast to my covenant-- 7 these I will bring to my holy mountain and give them joy in my house of prayer. Their burnt offerings and sacrifices will be accepted on my altar; for my house will be called a house of prayer for all nations." (Isa. 56:6-7)
"But that we write unto them, that they abstain from pollutions of idols [alisgematon ton eidolon] and from fornication [porneias] and from things strangled [pniktou] and from blood [haimatos]," (Acts 15:20)
"Nevertheless, I have a few things against you: There are some among you who hold to the teaching of Balaam, who taught Balak to entice the Israelites to sin so that they ate food sacrificed to idols and committed sexual immorality [eidolothuta kai porneusai]," (Rev. 2:14)
"Nevertheless, I have this against you: You tolerate that woman Jezebel, who calls herself a prophet. By her teaching she misleads my servants into sexual immorality and the eating of food sacrificed to idols [porneusai kai eidolothuta]" (Rev. 2:20)
"The Jewish philosopher Philo described the revolting practice of how pagans would often strangle or choke their sacrifices, not letting the blood out, in opposition to God's law: 'But some men, with open mouths, carry even the excessive luxury and boundless intemperance of Sardanapalus to such an indefinite and unlimited extent, being wholly absorbed in the invention of senseless pleasures, that they prepare sacrifices which ought never be offered, strangling their victims, and stifling the essence of life [Leviticus 17:11], which they ought to let depart free and unrestrained, burying the blood, as it were, in the body. For it ought to have been sufficient for them to enjoy the flesh by itself, without touching any of those parts which have a connection with the soul or life' (Special Laws 4.122)," (from McKee's Acts 15 For the Practical Messianic).
"For the law of Moses has been preached in every city from the earliest times and is read in the synagogues on every Sabbath." (Acts 15:21).