Ibn 'Umar said that the Messenger of Allah ﷺ used to deliver the sermon on Friday while standing. He would then sit and then stand (for the second sermon) as they (the Muslims) do nowadays.  

كَانَ رَسُولُ اللَّهِ ﷺ يَخْطُبُ يَوْمَ الْجُمُعَةِ قَائِمًا ثُمَّ يَجْلِسُ ثُمَّ يَقُومُ قَالَ كَمَا يَفْعَلُونَ الْيَوْمَ  

Yahya related to me from Malik from Jafar ibn Muhammad from his father that the Messenger of Allah ﷺ gave two khutbas on the day of jumua and sat down between them.  

أَنَّ رَسُولَ اللَّهِ ﷺ خَطَبَ خُطْبَتَيْنِ يَوْمَ الْجُمُعَةِ وَجَلَسَ بَيْنَهُمَا  

[Machine] About the Prophet ﷺ , it is narrated that he used to deliver the sermon standing on the day of Friday, then he would sit, and then he would stand and deliver the sermon.  

عَنِ النَّبِيِّ ﷺ أَنَّهُ كَانَ يَخْطُبُ يَوْمَ الْجُمُعَةِ قَائِمًا ثُمَّ يَقْعُدُ ثُمَّ يَقُومُ فَيَخْطُبُ  

[Machine] The Messenger of Allah ﷺ used to deliver the Friday sermon while standing, then he would sit, and then he would stand again.  

كَانَ رَسُولُ اللهِ ﷺ يَخْطُبُ يَوْمَ الْجُمُعَةِ قَائِمًا ثُمَّ يَقْعُدُ ثُمَّ يَقُومُ  

[Machine] The Messenger of Allah ﷺ used to deliver two sermons on Fridays, with a sitting session in between them.  

كَانَ رَسُولُ اللهِ ﷺ يَخْطُبُ يَوْمَ الْجُمُعَةِ خُطْبَتَيْنِ بَيْنَهُمَا جِلْسَةٌ  

"أَن النَّبِىَّ ﷺ كانَ يَخْطُبُ يَوْمَ الْجُمُعَةِ قَائِمًا، ثُمَّ يَقْعُدُ، ثُمَّ يَقُومُ فَيَخْطُبُ".