Some Etiquettes of Conversation
Abū ʿAmr ibn Al-ʿAlāʾ Al-Baṣrī, may Allāh have mercy on him, said:
It’s not from [good] manners that you respond to one who hasn’t asked you; or ask one who doesn’t respond to you; or speak to someone who doesn’t listen to you.
Al-Ādāb Al-Sharʿiyyah by Ibn Mufliḥ, vol. 3, p. 414.
Translated by Mikail ibn Mahboob Ariff