Sulaiman bin Da'ud bin al-Jarud سليمان بن داود أبو داود الطيالسي · Chapters on Seeking Permission

"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."

that a man said: "O Messenger of Allah! When a man among us meets his brother or his friend should he bow to him?" He said: "No." The man continued: "Should he embrace him and kiss him?" He said: "No." He said: "Should he take his hand and shake it?" He said: "Yes."