Ka'b ibn Zuhayr was the most renowned poet in the Arabian Peninsula. He had written satirical poetry against the Muslims, and it had become vulgar, even attacking Muslim women. After the Conquest of Makkah, his brother, who had become Muslim, wrote urging him to repent. Ka'b thought it over and decided that he did want to accept Islam. About two weeks after the Prophet ﷺ returned to Madinah from the conquest, Ka'b came to the city in secret. People there knew his name but not his face. He spent the night at the house of a relative and asked him to keep it quiet. After the Fajr prayer, Ka'b went up to the Prophet ﷺ without saying who he was. He put his hand in the Prophet ﷺ's hand and asked whether he would accept Ka'b ibn Zuhayr if he came seeking protection, repenting and accepting Islam. The Prophet ﷺ said yes. Ka'b then revealed that he was Ka'b ibn Zuhayr. One of the Ansar rose to strike him down, but the Prophet ﷺ stopped him, because Ka'b had come in repentance. Ka'b then asked to recite a poem, and the Prophet ﷺ allowed him. The classical books call it Banat Su'ad, and later scholars named it the Qasidat al-Burda, the Poem of the Cloak. It is the original poem of that name. It is different from the later and more famous Qasidat al-Burda of al-Busiri, a poet of the 7th century after the Hijrah who claimed to have seen the Prophet ﷺ in a dream.
The entire tribe of Muzayna, roughly 400 people, came to Madinah in the Year of Delegations to embrace Islam. When they prepared to return home, the Prophet ﷺ instructed Umar ibn al-Khattab RA to provide them food for the journey. Umar had only one bag of dates at home, but obeyed anyway, and found his room filled with dates to the ceiling. All 400 delegates filled their sacks from it, and the pile was reported unchanged when the last of them left.