Mahmud bin Ghaylan محمود بن غيلان العدوي مولاهم أبو أحمد · Chapters on Seeking Permission

"The Messenger of Allah (ﷺ) said to me: 'O my little son! When you enter upon your family then give the Salam, it will be a blessing for you and upon the inhabitants of your house."

"When the Prophet of Allah (ﷺ) wanted to write to the foreigners, it was said to him: 'The foreigners do not accept a letter unless it has a seal.' So he had a ring made." He said: "It is as if I am now looking at its whiteness in his hand."

that the Messenger of Allah (ﷺ) said: "No two Muslims meet each other and shake hands, except that Allah forgives them before they part."