Council of Chalcedon, Canon XV

A woman shall not receive the laying on of hands as a deaconess under forty years of age, and then only after searching examination.  And if, after she has had hands laid on her and has continued for a time to minister, she shall despise the grace of God and give herself in marriage, she shall be anathematized and the man united to her.

Translation: Henry R. Percival, The Seven Ecumenical Councils, NPNF II.14 (1900), via CCEL.