مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2899
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
Ibn 'Abbas (رضي الله عنه) said: The Messenger of Allah (ﷺ) said: 'Every Prophet (ﷺ) has a sanctuary and my sanctuary is Madinah. O Allah, I declare it sacred by Your authority. The evildoer is not to be given sanctuary in it, its grasses are not to be cut, its thorns are not to be cut and its lost property is not to be picked up except by one who will announce it.
Musnad Ahmad 2920Hasan because of corroborating evidence]