They told their father that they would take him out to play while they tend to their herd. They succeeded in convincing him that they would take care of him. After some hesitation, Yaqoub pbuh sent Yusuf pbuh with his brothers, and they showed their love and protection for Yusuf.
(They said, “O our father! Why do you not trust us with Yusuf pbuh, although we truly wish him well?” Send him out with us tomorrow so that he may enjoy himself and play. And we will really watch over him.”) Yusuf 12:11-12
قالوا لأبيهم أنهم يريدوا أن يأخذوا يوسف معهم ليلعب بينما هم يرعون الغنم. و قد بعد جهد نجحوا في إقناع أبيهم و تردد كثيرا لكن يعقوب عليه السلام أرسل يوسف عليه السلام مع إخوته. وأظهر الأخوة حبهم و خوفهم على يوسف.
(قَالُواْ يَٰأَبَانَا مَا لَكَ لاَ تَأْمَنَّا عَلَىٰ يُوسُفَ وَإِنَّا لَهُ لَنَاصِحُونَ أَرْسِلْهُ مَعَنَا غَدًا يَرْتَعْ وَيَلْعَبْ وَإِنَّا لَهُ لَحَافِظُونَ )
يوسف 12: 11- 12