GEN 37:2

2 These are the toldot Ya'akov. Yosef, being seventeen years old, was ro'eh with his achim to the tzon; now the na'ar was with the bnei Bilhah, and with the bnei Zilpah, the ne'shei Aviv [(the wives of his father)]; and Yosef brought unto Avihem [(their father)] dibbatam ra'ah [(a bad, evil report of them)].