Malachi 1:11
10 “I wish that one of you would close the temple doors, so that you no longer would light useless fires on my altar. I am not pleased with you,” says the Lord of Heaven’s Armies, “and I will no longer accept an offering from you. 11 For from the east to the west my name will be great among the nations. Incense and pure offerings will be offered in my name everywhere, for my name will be great among the nations,” says the Lord of Heaven’s Armies. 12 “But you are profaning it by saying that the table of the Lord is common and its offerings despicable. 13 You also say, ‘How tiresome it is.’ You turn up your nose at it,” says the Lord of Heaven’s Armies, “and instead bring what is stolen, lame, or sick. You bring these things for an offering! Should I accept this from you?” asks the Lord. 14 “There will be harsh condemnation for the hypocrite who has a valuable male animal in his flock but vows and sacrifices something inferior to the Lord. For I am a great king,” says the Lord of Heaven’s Armies, “and my name is awesome among the nations.”
Didache 14:2
1 On the Lord's Day, gather together, break bread, and hold the Eucharist, after confessing your sins, so that your offering may be pure. 2 But let no one who is in conflict with another person join your gathering until they are reconciled, so that your sacrifice is not tainted. 3 For this is what the Lord said: 'In every place and time, offer me a pure sacrifice, for I am a great king, and my name is held in awe among the nations.'
Notes and References
"... One final point should be made here with respect to an alleged dependence of the Didache on Matthew. The instruction of Did 14:2 betrays its nearness to the meaning of Matt 5:23-24. Temple worshippers must not offer sacrifices and place the gift on the altar without first dealing with dissension in their relationship with others. Indeed, the rule as a whole recalls the attitude demanded by the Lord in the saying of Matt 5:23-24. However, rather than supporting its demand by appealing to Matthew, the Didache in 14:3 renders an Old Testament quotation from Mal 1:11.14 legitimating the concern to preserve the purity of the eucharistic meal ..."
van de Sandt, H. W. M. 'Do Not Give What Is Holy to the Dogs': The Eucharistic Food of the Didache in Its Jewish Purity Setting (p. 245) Vigiliae Christianae, Vol. 56, No. 3, 2002