The Prophet (peace and blessings be upon him) said:
"Indeed, when the Children of Israel fell into ruin, they had begun (abandoning knowledge and action and merely) telling stories."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 2045
Hadith Gradingالألبانی:صحيح
Hadith Takhrij[طب الضياء] عن خباب. الصحيحة ١٦١٨: حل.