The Lord's Day took the place of the Jewish Sabbath as the weekly day of public worship. The substance remained, the form was changed. The institution of a periodical weekly day of rest for the body and the soul is rooted in our physical and moral nature, and is as old as man, dating, like marriage, from paradise. This is implied in the profound saying of our Lord: "The Sabbath is made for man." It is incorporated in the Decalogue, the moral law, which Christ did not come to destroy, but to fulfil, and which cannot be robbed of one commandment without injury to all the rest.History of the Christian Church: https://ccel.org/ccel/schaff/hcc1/hcc1.i.IX.57.html
The day was transferred from the seventh to the first day of the week, not on the ground of a particular command, but by the free spirit of the gospel and by the power of certain great facts which he at the foundation of the Christian church. It was on that day that Christ rose from the dead; that he appeared to Mary, the disciples of Emmaus, and the assembled apostles; that he poured out his Spirit and founded the churchHistory of the Christian Church: https://ccel.org/ccel/schaff/hcc1/hcc1.i.IX.57.html
the Jewish Sabbath was hedged around by many national and ceremonial restrictions, which were not intended to be permanent, but were gradually made so prominent as to overshadow its great moral aim, and to make man subservient to the sabbath instead of the sabbath to man.History of the Christian Church: https://ccel.org/ccel/schaff/hcc1/hcc1.i.IX.57.html
The due observance of it, in which the churches of England, Scotland, and America, to their incalculable advantage, excel the churches of the European continent, is a wholesome school of discipline, a means of grace for the people, a safeguard of public morality and religion, a bulwark against infidelity, and a source of immeasurable blessing to the church, the state, and the family. Next to the Church and the Bible, the Lord's Day is the chief pillar of Christian society. Besides the Christian Sunday, the Jewish Christians observed their ancient Sabbath also, till Jerusalem was destroyed. After that event, the Jewish habit continued only among the Ebionites and Nazarenes.https://ccel.org/ccel/schaff/hcc1/hcc1.i.IX.57.html
In the gospel dispensation the Sabbath is not a degradation, but an elevation, of the week days to a higher plane, looking to the consecration of all time and all work. It is not a legal ceremonial bondage, but rather a precious gift of grace, a privilege, a holy rest in God in the midst of the unrest of the world, a day of spiritual refreshing in communion with God and in the fellowship of the saints, a foretaste and pledge of the never-ending Sabbath in heaven.https://ccel.org/ccel/schaff/hcc1/hcc1.i.IX.57.html
The universal and uncontradicted Sunday observance in the second century can only be explained by the fact that it had its roots in apostolic practice. Such observance is the more to be appreciated as it had no support in civil legislation before the age of Constantine, and must have been connected with many inconveniences, considering the lowly social condition of the majority of Christians and their dependence upon their heathen masters and employers. Sunday thus became, by an easy and natural transformation, the Christian Sabbath or weekly day of rest, at once answering the typical import of the Jewish Sabbath, and itself forming in turn a type of the eternal rest of the people of God in the heavenly Canaan.https://ccel.org/ccel/schaff/hcc1/hcc1.i.IX.57.html
[Chrysostom] urged that every house should be church, and every head of a family a spiritual shepherd, remembering the account he must give even for his children.Nicene and Post-Nicene Christianity Vol 3 , 545