1 Corinthians 11:5-6 NIV

5 And every woman who prays or prophesies1 with her head uncovered dishonors her head--it is just as though her head were shaved.2

References for 1 Corinthians 11:5

6 If a woman does not cover her head, she should have her hair cut off; and if it is a disgrace for a woman to have her hair cut or shaved off, she should cover her head.