Abdul Malik bin Ibrahim al-Jaddi عبد الملك بن إبراهيم الجدي · General Behavior (Kitab Al-Adab)

The Prophet (ﷺ) said: When one of you comes to an assembly, he should give a salutation and if he feels inclined to get up, he should give a salutation, for the former is not more of a duty than the latter.