“And the multitude sat about him; and they say to him: Behold thy mother and thy brethren without seek for thee.”
You need to read your own quote. He’s addressing the multitude. He’s not rebuking his mother. This is why he says, whomever follows the word of God, is my brother, and mother and sister.
Look again..His mother and brothers wanted to see him..the crowd told His so He could go to them...What did He say..YOU that do the will of my Father are as dear and as important to me as my mother and family.
He did not get up in response to his mothers call, He continued teaching
His mother and brothers thought He was crazy or demon possessed..
Read Mark on this
Mark3:20 One time Jesus entered a house, and the crowds began to gather again. Soon he and his disciples couldn’t even find time to eat.
21 When his family heard what was happening, they tried to take him away. “He’s out of his mind,” they said.
22But the teachers of religious law who had arrived from Jerusalem said, “He’s possessed by Satan,e the prince of demons. That’s where he gets the power to cast out demons.”
23Jesus called them over and responded with an illustration. “How can Satan cast out Satan?” he asked.
24“A kingdom divided by civil war will collapse.
25Similarly, a family splintered by feuding will fall apart.
26And if Satan is divided and fights against himself, how can he stand? He would never survive.
27Let me illustrate this further. Who is powerful enough to enter the house of a strong man like Satan and plunder his goods? Only someone even stronger—someone who could tie him up and then plunder his house.
28“I tell you the truth, all sin and blasphemy can be forgiven,
29but anyone who blasphemes the Holy Spirit will never be forgiven. This is a sin with eternal consequences.”
30He told them this because they were saying, “He’s possessed by an evil spirit.”
31Then Jesus’ mother and brothers came to see him. They stood outside and sent word for him to come out and talk with them.
32There was a crowd sitting around Jesus, and someone said, “Your mother and your brothersf are outside asking for you.”
This verse reveals what family members believed Jesus was insane , and that they found him at this point.. remember they had gone to find him , because they wanted to take charge of Him( vs 21) and arrived here at verse 31.)...Mary was with them
33Jesus replied, “Who is my mother? Who are my brothers?”
34Then he looked at those around him and said, “Look, these are my mother and brothers.
35Anyone who does God’s will is my brother and sister and mother.”
Jesus here makes a clear distinction between the family of the flesh and a spiritual family. His earthly family were not doing the will of God in this circumstance..