To put it simply, your virtue of beneficence motivates your actions of benevolence. Volunteer work or giving to charity is benevolence; your virtue underlying these actions is beneficence. Beneficence is the character trait or virtue that is the basis of your direct actions benefiting others. These actions protect, promote, or enhance the self-determination, empowerment, rights, and well-being of others.
Your beneficence upholds four bioethical principles: do no harm; prevent harm; remove harm, and do or promote good.