Shaddad bin al-Azma' reports that a man observed i'tikaf in his tent, and people pelted him with pebbles. The man sent a message to Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him), so Sayyiduna Abdullah (may Allah be pleased with him) came, drove the people away, and approved of it (his action).
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9479