In Christianity, worship is the act of attributing reverent honour and homage to God. In the New Testament, various words are used to refer to the term worship. One is proskuneo which means to bow down to God or kings.

Maundy, or Washing of the Saints' Feet, Washing of the Feet, or Pedelavium or Pedilavium, is a religious rite observed by various Christian denominations. The word mandatum is the first word of the Latin Biblical quotation sung at the ceremony of the washing of the feet: "Mandatum novum do vobis ut diligatis invicem sicut dilexi vos", from the text of John 13:34 in the Vulgate. The ceremony commemorates the commandment of Christ that his disciples should emulate his loving humility in the washing of the feet. The medieval Latin term mandatum, came to apply to the rite of foot-washing on the Thursday preceding Easter Sunday, known in English as "Maundy Thursday" since at least 1530.