WE RELATE FROM the Sunans of Abū Dāwūd, at-Tirmidhī and others that Abū Rāfi‘ 
, the freed slave of the Messenger of Allah 
, reported: “I saw the Messenger of Allah say the adhān for ṣalāh in the ear of Ḥusayn ibn ‘Alī when Fāṭimah gave birth to him .” [1].At-Tirmidhī says that this is a ḥasan ṣaḥīḥ hadith.
, the freed slave of the Messenger of Allah , reported: “I saw the Messenger of Allah say the adhān for ṣalāh in the ear of Ḥusayn ibn ‘Alī when Fāṭimah gave birth to him .” [1].At-Tirmidhī says that this is a ḥasan ṣaḥīḥ hadith.One group of our [Shāfi‘ī] colleagues say that it is mustaḥabb to say the adhān in the right ear and the iqāmah in the left ear.
And we relate from the book of Ibn as-Sunnī from al-Ḥusayn ibn ‘Alī 
that the Messenger of Allah said: “Whoever has a child born to him, if he calls the adhān in his right ear and the iqāmah in his left, the mother of the child will not harm him.”
that the Messenger of Allah said: “Whoever has a child born to him, if he calls the adhān in his right ear and the iqāmah in his left, the mother of the child will not harm him.”References
[1] Abū Dāwūd (5105) and at-Tirmidhī (1514).