Muhammad was by nature, and both before and after islam and revelation, a very generous and charitable man.
This is what his companions said:

Ibn Abbas said that he heard God's Messenger say, "The believer is not the one who eats when his neighbour beside him in hungry,"

Anas (may Allah be pleased with him) reported: “A man came to the Prophet and spoke to him in a very bad way saying:” Oh Muhammad, give me some of Allah’s gifts you have.” The Prophet looked at him and smiled, then he ordered giving him the money he needed.” Agreed upon

Anas (may Allah be pleased with him) said:” Muhammad never refused helping anyone for the sake of Islam. He gave a man a drove of sheep so that the man went back to his tribe saying:” Follow Muhammad who is so generous and doesn’t fear poverty.”

“He also gave Safwan bin Umaiah in the Day of Hunain 100’s of cattle.” Narrated by Muslim

Ibn Abbas (may Allah be pleased with him) reported: “Muhammad was very generous especially in the holy month of Ramadan (the fasting month).”

“The Prophet once received 70 thousand Dirham and started to give all needy till all the money finished.” Narrated by Abu Al Sheikh