Where did Joseph finally find his brothers pasturing the flocks?

Answer: Dothan

His brothers had moved on from Shechem. A man said he heard them say, "Let us go to Dothan," and Joseph found them there.

““They have moved on from here,” the man answered. “I heard them say, ‘Let us go to Dothan.’” So Joseph set out after his brothers and found them at Dothan.”— Genesis 37:17 (BSB)