English translation
6255. Narrated ‘Abdullāh bin Ka'b: I heard Ka'b bin Mālik narrating (when he did not join the battle of Tabūk): Allāh's Messenger ﷺ forbade all the Muslims to speak to us. I would come to Allāh's Messenger ﷺ and greet him, and I would wonder whether the Prophet did move his lips to return my greetings or not, till fifty nights passed away. The Prophet ﷺ then announced (to the people) Allāh's forgiveness for us (acceptance of our repentance) at the time when he had offered the Fajr Ṣalāt (prayer).
