Rationalization of wrongdoing

قَالَ قَآئِلٌ مِّنْهُمْ لَا تَقْتُلُوا۟ يُوسُفَ وَأَلْقُوهُ فِى غَيَـٰبَتِ ٱلْجُبِّ يَلْتَقِطْهُ بَعْضُ ٱلسَّيَّارَةِ إِن كُنتُمْ فَـٰعِلِينَ

Said a speaker among them, "Do not kill Joseph but throw him into the bottom of the well; some travelers will pick him up - if you would do [something]."