I prayed with the Prophet ﷺ, and when he recited "nor of those who are astray" [Fatihah 1:7], he said, "Ameen," and we heard it.
حدثنا محمد بن الصباح وعمار بن خالد الواسطي قالا حدثنا أبو بكر بن عياش عن أبي إسحق
صليت مع النبي ﷺ فلما قال {ولا الضالين} قال آمين فسمعناها
Sahih. Abdul-Jabbar did not hear from his father, as noted in Tahdhib and elsewhere, and Abu Ishaq was mentioned previously, h: 46, and Ibn Ayyash is daif according to the more correct view. The hadith has sahih corroborating narrations in Abu Dawud, h: 932, 933, and elsewhere.