It is found singly and sometimes doubly at the end of prayers (Psalm 41:13; 72:19; 89:52), to confirm the words and invoke the fulfilment of them. It is used in token of being bound by an oath (Numbers 5:22; Deuteronomy 27:15-26; Nehemiah 5:13; 8:6; 1 Chronicles 16:36). In the primitive churches it was common for the general audience to say “Amen” at the close of the prayer (1 Corinthians 14:16).