{This is research of brother Syed Hasni; I am translating it to English; may Allah give him happiness in both the worlds. Amin}

Abdul Wahab bin Ahmad writes in his book “al Meezan ul Kubra” that

Abu Hanifa said that I will leave my opinion if I get opinion from any of the companions except Anas bin Mailk, abu Huraira, and Samura jundab;

Some of them said that This was because there was problem in knowledge/maarifat and lack of news from madarik (?) and ijtihad

[Meezan ul Kubra Sheeraniya, vol 1, page 79]

here are the scans from the book