ENOfficial
‘Ata’ told in mursal form that when the Prophet (ﷺ) preached he would lean on his javelin. Shafi'i transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْ عَطَاءٍ مُرْسَلًا أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ إِذَا خَطَبَ يَعْتَمِدُ عَلَى عنزته اعْتِمَادًا. رَوَاهُ الشَّافِعِي
sunnah.com