Ja'far bn Muhammad as-Saa'igh said:
بصر عيني - وإلا فعميتا - ، وسمع أذني - وإلا فصمتا - أحمد بن نصر الخزاعي حيث ضرب عنقه يقول رأسه: "لا إله إلا الله "‼
" I saw with both of my eyes and heard with both of my ears, when Ahmad bn Nasr al-Khazza'ee was beheaded (unjustly for saying the Qur'an is not a creation), his head was chanting: " laa ilaaha illal Laah ".
- Tabaqaatul hanaabilah (1/81).