The prohibition of cutting the trees of Madinah

It is narrated from Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him) that he would go out of Madinah, and if he found a woodcutter who had cut a fresh branch from one of the trees of Madinah, he would seize his belongings. When he was spoken to about this, he would say: "I will not give up spoils that the Messenger of Allah (peace and blessings be upon him) has granted me," even though he was among the very wealthy people.
This hadith has a sahih (authentic) chain of narration, but the two Shaykhs did not record it.

It is narrated from Amir bin Sa'd that Sayyiduna Sa'd (may Allah be pleased with him) was riding to his palace in the valley of al-Aqiq when he found a slave cutting trees, so he seized his belongings. When he returned, the slave's owners came to him and asked for their things back. He said: "Allah forbid that I should return something that the Messenger of Allah (peace and blessings be upon him) has granted me as a reward!" So he did not return anything.
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.