פירוש על עבודה זרה 34:4

This is the story of the arrest of R. Elazar b. Perata on five charges (which are not listed here) and the arrest of R. Hanina b. Tradion for only one charge, studying Torah. R. Hanina b. Tradion, despite being arrested for only one charge, will not escape punishment, whereas R. Elazar b. Perata will. This is because R. Hanina only studied Torah and did not occupy himself with “gemilut hasadim.”
The Talmud adds in here a general accusation against a person who only studies Torah and does not occupy himself with “gemilut hasadim.” One who only studies Torah is akin to one who has no God. This is certainly a biting criticism of one who leads this type of imbalanced life.