1 Corinthians 11:5-6

5But when a woman prays or she speaks a message from God, she should cover her head. If she does not cover her head, she does not respect the one who is her head. It would be as bad as if she cut off all her hair.

6If a woman refuses to cover her head, she should cut off her hair. But, if a woman has no hair, or she has very short hair, she becomes very ashamed. So it is better that she should cover her head in your meetings.