Mu'adh bin Jabal narrated:
The Messenger of Allah (ﷺ) dispatched me to Yemen. When I had left, he sent a message after me, so I returned and he said: 'Do you know why I sent a message to you ? Do not take anything without my permission, for that will be Ghulul, and whoever commits Ghulul, he comes with what he took on the Day of Judgement. This is why I called you, so now go and do your job.'