Answer
All of St. John chapter 6 of the New Testament features Christ declaring that people must partake of His flesh and blood which He will give to them. Christ's words are such that the people take His meaning literally and indeed Christ is adamant, encouraging this literal interpretation even when some of His own disciples depart. The apostles themselves know this is no parable, often they ask Christ to expound parables He has told the crowd, but their reaction this time is one that takes his words literally as well. They realize what He has said is impossible and revolting, yet they respond with Faith that He will reveal how this will be done. The manner by which Christ will fulfill His words is found at the Last Supper, when Christ again references His Body and Blood but reveals them to be present in the Bread and Wine used in the Pasch ceremony. Christ is here instituting the sacrifice of the New Law and His declarative words are words of consecration. You can find this institution in full context within the Gospels: St. Matthew chapter 26, St. Mark chapter 14, and St. Luke chapter 22. Even St. Paul speaks of it in 1 Corinthians 11:27-29. The Catholic Church uses these exact words and actions of Jesus which He commissioned his disciples, the leaders of His Church, to do also in order to enact this same sacrament every time the sacrament is celebrated.
The Eucharist sacrament is not in The Bible and was established by the Catholic Church. This 'holy communion' recalls Christ' Last Supper and the breaking of the bread and drinking of the wine. It is mentioned in the Didache of the 1st or 2nd Century AD but was considered 'spurious' and not included in the New Testament. Those who practice or celebrate this 'sacrament' point to Luke 24:35 and 1 Corinthians 11:20-21, etals, as early references to this custom. There is debate among these as to when this recalling of the Last Supper is to take place: daily; weekly; or annually as a remembrance commanded by Christ our Passover.
At the house of the man mentioned in Mt. 26:18. For sure, the house is located at Jerusalem.
Holy Thursday celebrates the institution of the Eucharist.
The institution of marriage, the institution of government, the institution of armed forces, the institution of the Kingdom of God are all institutions seen often in the Bible.
The readings for the Mass on Holy Thursday evening commemorate the Passover, the Last Supper, the institution of the Eucharist, and the institution of the priesthood.Reading I: Exo 12:1-8, 11-14Responsorial Psalm: Psa 116:12-13, 15-16bc, 17-18Reading II: 1 Cor 11:23-26Gospel: Jn 13:1-5Read these different passages and you'll find the stories of Holy Thursday.
The Pontifical Biblical Institute is the institution for Bible study in Rome, there is a bilingual homepage below.
The Luminous Mysteries are The Baptism, The Wedding at Cana, The Sermon on the Mount, The Transfiguration, and The Institution of the Eucharist.
The Eucharist is not directly linked to Ash Wednesday. The institution of the Eucharist at the Last Supper is celebrated on Holy Thursday (the Thursday before Easter Sunday). Holy Thursday is toward the end of the season of Lent, and Ash Wednesday is the first day of that season.
The institution of the Catholic priesthood occurred at the Last Supper. The Lord Jesus took bread and wine, and transformed them into his body and blood (Eucharist). The Lord commanded that the apostles to continue to consecrate the Eucharist in remembrance of him. In the Gospel of John (13:15), Jesus also told the apostles "I have given you a model to follow, so that as I have done for you, you should also do." Thus on Holy Thursday, Catholics celebrate the institution of the priesthood.
the season of lent
Holy Thursday when Our Lord took the bread, blessed and broke it and gave it to his disciples saying, "Take and eat of this all of you, this is my body." He did the same with the wine and then told his apostles, " When you do these things, in memory of me you shall do them." The Eucharist was thus established.
the institution of goverment and of family
At the Last Supper on Holy Thursday, Our Blessed Lord was celebrating the Passover Supper. When He took the Third Cup of Blessing (there are four cups of wine drunk at a Passover), He instituted the Most Holy Eucharist by proclaiming the Bread to be His Body, and the Wine to be His Blood. The Institution Narratives are in the three synoptic Gospels, Matthew 26:17-29, Mark 14:12-25, Luke 22:14-20. In St. John's Gospel, there is no institution narrative, but the entire sixth chapter of his Gospel is all about the Eucharist.
you can find Bible verses from the Bible, and the internet.