From Fatawa Ridawiyyah, vol.12, p.112 http://www.alahazratnetwork.org/fatawa/12/index1.htm
The scholars say that whichever issue was not dealt with by Imam Abu Hanifa, it will remain perplexing until the day of judgement. When Imam Abu Yusuf became confused regarding certain issues [masayil], he would say: “When there is no ruling [qawl] from our teacher; then this [perplexity] is our state”. It is in the Mufsadat al-Salah of Bahr al-Ra’iq that:
It is true what the author of Fatawa Zahiriyah has said in the third chapter of Qir’at al-Qur’an that any issue where the ruling of Imam Abu Hanifa radiyAllahu ta’ala anhu is not present; it will remain puzzling till the day of judgement. It is reported about Imam Abu Yusuf raHmatullah ‘alaih that when he was flummoxed concerning certain issues, he said: “On whichever issue there is no ruling from our Shaykh, then this is our resulting state”.
The scholars say that whichever issue was not dealt with by Imam Abu Hanifa, it will remain perplexing until the day of judgement. When Imam Abu Yusuf became confused regarding certain issues [masayil], he would say: “When there is no ruling [qawl] from our teacher; then this [perplexity] is our state”. It is in the Mufsadat al-Salah of Bahr al-Ra’iq that:
It is true what the author of Fatawa Zahiriyah has said in the third chapter of Qir’at al-Qur’an that any issue where the ruling of Imam Abu Hanifa radiyAllahu ta’ala anhu is not present; it will remain puzzling till the day of judgement. It is reported about Imam Abu Yusuf raHmatullah ‘alaih that when he was flummoxed concerning certain issues, he said: “On whichever issue there is no ruling from our Shaykh, then this is our resulting state”.