Ways of The Prophet (S.A.W)by Sheikh Muhammad Abdul Hai Arifi
Style of preaching
When the Holy Prophet (Sallallahu Alaihi Wa Sallam) had to deliver a sermon in the mosque, he stood leaning on his staff and if he did so in the battlefield, he used to lean on his bow. Specific and brief sittings were held for sermonizing almost after every prayer but such a sitting was a special feature after finishing the morning prayer, and such a meeting was often held at his bidding for the general benefit of the people.
If he wanted to lay special emphasis on any point during a sermon, he used to swear with these words: “I swear by Him in Whose hand is my soul.”