Rabbi Ya'aqob Menashe
The Rambam writes that it is a Miswah (Mitzvah) to be happy and to gladden his wife and children on the holidays. While he is eating and drinking he must feed the convert, the orphan, the widow and the other poor unfortunate ones.
One who locks his doors and gates and sits and eats with his family without feeding the poor is not fulfilling the Miswah of happiness but only the happiness of his belly. About such people it is said, "Their sacrifices are like stolen bread, all who eat it become impure...".
There is an age old custom to take wheat and distribute it to the poor, in order to assist them with the substantial expenses during the holiday of Pesah (Passover). Nowadays, it is not customary to give wheat but to give charity to the poor, which they use for their holiday needs. This is often done by giving money to institutions who take care of the distribution.
(See Maamar Mordekhai - Hilkhoth Haggim, 2:)
הריני מקבל עלי מצוה עשה של ואהבת לרעך כמוך, והריני אוהב כל אחד מבני ישראל כנפשי ומאודי
