Al-ʿAskari records it, saying: Ḥafṣ ibn Ghiyāth narrated to us, from Hishām, with this very chain.
This Sahl is one of Muslim’s own teachers, and the rest of the transmitters are the narrators relied upon by the Six Books.
Abū Dāwūd also brought it through the route of Ibrāhīm ibn Mahdī: ‘Alī ibn Mushir narrated to us, from Hishām.
Ibrāhīm was declared trustworthy by Abū Ḥātim, and the remaining transmitters are found in both al-Bukhārī and Muslim.
Ibn Ḥibbān included the report in his Ṣaḥīḥ—as cited in al-Targhīb—under the heading: “Chapter: The permissibility, on hearing the adhān, of restricting oneself to saying: ‘Wa anā, wa anā (And so do I, and so do I).’ ” Al-Manāwī mentioned it in Fayd al-Qadīr and commented: “That is, when the caller testifies that there is no deity but Allah he responds, ‘And I,’ and when the caller testifies that Muhammad is the Messenger of Allah he again responds, ‘And I.’ ”
The ḥadīth is further supported by the narration of ʿAbd Allah ibn Salām found in al-Majmaʿ.
Second: After completing the responses to the call, one should invoke blessings upon the Prophet ﷺ, for whoever sends a single blessing upon him, Allah will send ten blessings upon that person.
This is established by the ḥadīth of ʿAbd Allah ibn ʿAmr ibn al-ʿĀṣ, who heard the Prophet ﷺ say:
“When you hear the mu’adhdhin, repeat what he says; then invoke blessings upon me, for whoever invokes one blessing upon me, Allah will send ten blessings upon him. Then ask Allah to grant me al-wasīlah, for it is a rank in Paradise that will be granted to only one of Allah’s servants, and I hope that I am that servant. Whoever asks al-wasīlah for me, the intercession becomes lawful for him.”
Muslim, Abū Dāwūd, and al-Nasāʾī transmitted the report, and Ibn al-Sunnī also cited it.