Matthew
Matthew 12:50ESV·traditional attribution

For whoever does the will of my Father in heaven is my brother and sister and mother.”

John Calvin Reformed @genevareformer

50. For whosoever shall do the will of my Father who is in heaven. When he says that they do the will of his Father, he does not mean that they fulfill, in a perfect manner, the whole righteousness of the law; for in that sense the name brother, which is here given by him to his disciples, would not apply to any man.

Matthew Henry Presbyterian @wholebiblehenry

Many excellent, useful sayings came from the mouth of our Lord Jesus upon particular occasions; even his digressions were instructive, as well as his set discourses: as here, Observe, I. How Christ was interrupted in his preaching by his mother and his brethren, that stood without, desiring to speak with him (Mat 12:40, Mat 12:47); which desire of theirs was conveyed to him through the crowd.

Commenting on Matthew 12:46-50

Albert Barnes Presbyterian @notesbybarnes

Verse 50. (w) "will of my Father" . REMARKS ON MATTHEW CHAPTER 12 (1.) Our Saviour has taught us the right use of the Sabbath, . His conduct was an explanation of the meaning of the fourth commandment. By his example we may learn what may be done.