Sending Salawaat on the Prophet (صلى الله عليه وآله وسلم) during Adhaan

أَبُو جَعْفَرٍ ع إِذَا أَذَّنْتَ فَأَفْصِحْ بِالْأَلِفِ وَ الْهَاءِ وَ صَلِّ عَلَى النَّبِيِّ كُلَّمَا ذَكَرْتَهُ أَوْ ذَكَرَهُ ذَاكِرٌ فِي أَذَانٍ وَ غَيْرِهِ

“Aboo Ja`far (عليه السلام) when you do adhaan be eloquent in (saying) the ‘alif’ and ‘ha’ and do Salaah (prayers) upon the Prophet (صلى الله عليه وآله وسلم) whenever he is mention or is mentioned by a mentioner in the adhaan and other than that.”

Source:

1.     Al-Kulayni, Al-Kaafi, vol. 3, pg. 303, hadeeth # 7

Grading:

1.       Al-Majlisi said this hadeeth is Hasan (Good)
à Mir’aat Al-`Uqool, vol. 15, pg. 84