مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1933
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn ‘Abbas that the Messenger of Allah (ﷺ) said: “No man should be alone with a woman and no woman should travel unless she has a mahram with her." A man came and said: My wife has gone out for Hajj and I have enlisted in such and such a campaign. He said: “Go and do Hajj with your wife."
Musnad Ahmad 1934Sahih (Darussalam) [ al-Bukhari (1862) and Muslim (1341)]