Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: Talking has been declared disliked on four occasions: on Friday, on the day of Eid al-Fitr, on the day of Eid al-Adha, and in the prayer for rain (istisqa'), once the imam has taken his place on the pulpit and begun speaking, until he comes down from the pulpit.
Al-Tabarani recorded it in al-Mu'jam al-Kabir; its chain contains Yahya bin Salamah bin Kuhayl, whom Bukhari (may Allah have mercy on him), al-Nasa'i (may Allah have mercy on him), al-Tirmidhi and Yahya bin Ma'in declared da'if (weak), while Ibn Hibban declared him thiqah (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 3132