A man sitting with another before asking his permission

Abu Burdah said: I entered the mosque of Madinah and Sayyiduna Abdullah bin Salam (may Allah be pleased with him) was sitting there. I greeted him with salam and then sat down. At this he said: O my nephew! You have sat down, and we intend to rise.

Ash'ath reported from a man that someone sat down with al-Hasan, and he said to him: You have sat down with us at the time we are rising. Do you give permission for us to rise?

Imran said that Abu Mijlaz said: When someone deliberately sits with you, do not rise before asking his permission.

Something similar is reported from Ibrahim.

Sayyiduna Anas bin Malik (may Allah be pleased with him) said that no man ever sat with the Messenger of Allah (peace and blessings be upon him) except that he would rise only when that man rose.

Ibn Awn said that Muhammad (Ibn Sirin) saw no harm in a man who is sitting with another man rising without asking his permission.

Musa bin Nafi' said: I was sitting with Sa'id bin Jubayr. When he intended to rise, he said: You are sitting with me; do you give permission?