Sadaqah, meaning ‘charity, comes from the word sidq or sincerity. It is a voluntary act of charity that is a pure, sincere investment in the Hereafter.
Unlike Zakat, Sadaqah is not obligatory on a Muslim and has no limits or guidelines. There is no limitation on the amount that you can give and even the smallest amount can count as Sadaqah. In Islam even a smile is considered Sadaqah. It essentially encompasses any act of charitable giving done which is done out of love, generosity or compassion.
“Those who (in charity) spend of their goods by night and by day, in secret and in public, have their reward with their Lord: on them shall be no fear, nor shall they grieve.” (Qur’an 2:274)
There are spiritual and social benefits of giving Sadaqah. From enhancing the welfare of people in society to purifying sins the rewards for both the receiver and giver are plenty.