Musnad Ahmad 2939

It was narrated from Ibn ‘Abbas (رضي الله عنه) that The Messenger of Allah (ﷺ) said: "Its trees are not to be cut and its game is not to be disturbed; its lost property is not permissible except for one who will announce it; and its grasses are not to be cut." Al-'Abbas said: O Messenger of Allah, except idhkhir. He said: “Except idhkhir.”