I am reading a book (Iman 100 by Teyba Foundation) and it says:
"It was also this trustworthiness that she [Khadija (r)] reminded him of when the revelation first came to him. When he came down from the mountain and was afraid of what occurred and that he feared it may not be something good, she told him in her beautiful words:
'Never! By God, God will never disgrace you. You keep good relations with your relatives, help the poor, serve your guests generously, and assist those hit with calamities.' (Sahih al-Bukhari)"
That is the exact quote form the book. What I am failing to see is where the hadith refers to the tustworthiness of the Prophet (s). It seems to refer to maintaining kinship bonds etc, but I am not seeing how these things imply trustworthiness. I thought trustworthiness was when you are entrusted things/responsibilities by people and you successfully take care of them and fulfill them.
Could it be that the author of the book I am reading meant that Prophet Muhammad (s) fulfilled the trusts and rights of people, and in that sense he was trustworthy (as well as the sense I just mentioned of literally taking care of things and tasks given to you by others).
tl;dr: In the above quote, what does the author mean by saying "It was also this trustworthiness that she [Khadija (r)] reminded him of", ie how does the hadith mentioned show his trustworthiness?