Sayyiduna al-Sa'ib bin Yazid (may Allah be pleased with him) said: There was no storytelling in the time of the Messenger of Allah (peace and blessings be upon him), nor in the time of Sayyiduna Abu Bakr and Sayyiduna Umar (may Allah be pleased with them both), until the first to tell stories was Sayyiduna Tamim al-Dari (may Allah be pleased with him). He sought permission from Sayyiduna Umar (may Allah be pleased with him), and he gave him permission, so he used to preach standing.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6626