Shayban bin 'Abdur Rahman شيبان بن عبد الرحمن النحوي أبو معاوية · Chapters on Seeking Permission

that the Prophet (ﷺ) was in his house when a man looked in at him, so he lunged towards him with an arrow head, so the man backed up.

"When the Messenger of Allah (ﷺ) would give the Salam he would do so three times, and when he would say a statement, he would say it three times."