Ibn 'Umar saw a shepherd with some sheep in a bad place and saw a place which was better than it. He told him, "Woe to you, shepherd! Move them! I heard the Messenger of Allah, may Allah bless him and grant him peace, say, 'Every shepherd is responsible for his flock.'"  

فَقَالَ لَهُ وَيْحَكَ يَا رَاعِي حَوِّلْهَا فَإِنِّي سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ كُلُّ رَاعٍ مَسْئُولٌ عَنْ رَعِيَّتِهِ