Hadith 31-147

وَبِهذَا الإِسنادِ عَنْ عَلِىِّ بْنِ الحُسَيْنِ‏عَلَيْهِمَا السَّلاَمُ أَنَّهُ قالَ: إِنَّ النَّبِيَ‏ صَلَّى اللهُ عَلَيْهِ وَآلِهِ أَذَّنَ فِي أُذُنِ الحَسَنِ‏ عَلَيْهِ السَّلامُ بِالصَّلاةِ يَوْمَ وُلِدَ.

According to the same documentation, on the authority of Ali ibn Al-Husayn (a.s.), “On the day on which Al-Hassan (a.s.) was born, the Prophet (S) said the general call to prayer (the ‘Azan) in his ear.”