Sabbath in Christianity is the inclusion in Christianity of a Sabbath, a day set aside for rest and worship, a mandatory practice described in the Ten Commandments in line with God's blessing of the seventh day (Saturday) making it holy, "because on it God rested from all his work that he had done in creation". The practice was associated with the assembly of the people to worship in synagogues on the day known as Shabbat. Early Christians, at first mainly Jewish, observed the seventh-day Sabbath with prayer and rest, but gathered on the seventh day, Saturday, reckoned in Jewish tradition as beginning, like the other days, at sunset on what would now be considered the Friday evening. As early as the late 2nd Century AD, Sunday was introduced by a few local churches, in addition to keeping the weekly Sabbath, so that the church could evangelise to the pagan Gentiles who had revered Sunday in honour of their sun-god, given the Sabbath was considered too pure to do so. It was not until the Council of Laodicea, in the 4th Century AD, was the non-observance of the Sabbath officially approved and replaced with Sunday, following Emperor Constantines Blue Laws in 321AD. The now majority practice of Christians is to observe Sunday, rather than the seventh-day Sabbath as a day of rest and worship. Despite the official change to Sunday, however, various churches continued to keep the weekly Sabbath throughout different periods in Christian history. Several hundred Sabbathkeeping Christian churches were established in southern India, and some were found even in China. Likewise the original Celtic Church in England, Scotland, and Ireland kept the seventh-day Sabbath. St. Patrick, Columba, and the churches they established kept the seventh day. The majority of these Sabbath keeping Christians settled, however, in the Alps, a place naturally suited for their protection, being situated where Switzerland, France, and Italy join, and were known as the Waldenses. Canon 26 of the Council of Elvira reveals that the Church of Spain at that time (305AD) kept Saturday, the seventh day. Similarly the Christian church in Persia in the 4th Century AD were found to be Sabbath keepers. The Ethiopian Tewahedo church have also been found to keep the Sabbath throughout Christian history. The modern day Ethiopian Christians observe a two-day Sabbath covering both Saturday and Sunday. For more than seventeen centuries the Abyssinian Church continued to sanctify Saturday