The church has the rest of the liturgical ritual being rooted in the Jewish Passover , Siddur , Seder , and synagogue services , including the singing of hymns ( especially the Psalms ) .
The church reading from the Scriptures ( Old and New Testament ) .
The church has the rest of the liturgical ritual being rooted in the Jewish Passover , Siddur , Seder , and synagogue services , including the singing of hymns ( especially the Psalms ) and reading from the Scriptures ( Old and New Testament ) .