The Sunnah of the mahram accompanying a woman on a journey

Question:
Honorable Shaykh, may Allah grant you success. What is the Sunnah of the mahram who accompanies a woman on a journey?

Answer:
Reaching puberty and having sound mind; two conditions are required: reaching puberty and having sound mind, and that he be one for whom she is forbidden to marry, whether by lineage or by another cause. A cause is like breastfeeding, or like a son-in-law, her husband’s father, or her husband’s son; this is a son-in-law. As for lineage, it would be her brother, her brother, or her paternal uncle, or her maternal uncle, and so on. Breastfeeding is the same: her brother by breastfeeding, her paternal uncle by breastfeeding, her father by breastfeeding, and so on. Yes.