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).