The best way of helping others is to secretly help them; concealing that help is also very simple; we can put an amount of money in an envelope and give it secretly to the poor. The term "destitute" refers to the disabled person in the culture of the Holy Qur'an; like the elderly people and those who are handicapped and are not capable of working. Allah Almighty has specified khums and zakat for eight groups of needy, as mentioned in the Holy Qur'an.
source : erfan.ir