According to Jesus, who are his mother and brothers?

His disciples

Then one said unto him, Behold, thy mother and thy brethren stand without, desiring to speak with thee.

But he answered and said unto him that told him, Who is my mother? and who are my brethren?

And he stretched forth his hand toward his disciples, and said, Behold my mother and my brethren! Matthew 12:47-49