Shafi’ee on Knowledge: It is only knowledge if it benefits

Rabia’ reported: Ash-Shafi’ee, may Allah be pleased with him, said, “Knowledge is not merely what is memorized. Knowledge is what benefits.”

Source: al-Madkhal ilá al-Sunan al-Kubrá 400

عن الربيع قال الشافعي رَضِيَ اللَّهُ عَنْهُ لَيْسَ الْعِلْمَ مَا حُفِظَ الْعِلْمَ مَا نَفَعَ

400  المدخل إلى السنن الكبرى للبيهقي