This evening we shall consider three good deeds of men that the Satan makes the best efforts to nullify. They are:

• Ahad : Promises or resolutions.
• Nazr : Or offerings.
• Sadaqa: Or Charity

When a person resolves to Allah for performing a certain act and to give a nazr (offering) after its fulfillment in accordance with the norms of fiqh, the Satan tries all the subterfuges at his command to prevent him from offering the promised nazr!

Similarly when one wants to give a sadaqa in Allah's way, Satan tries his level best to prevent the person from giving it. It has been oft recorded that when a person puts his hand in his pocket then Satan, and his numerous retainers, cling to the person's hand and put all sorts of fears in his mind. As the Holy Quran warns

Ash shaitan yaadakum al faqra wa yamurukumbil fahsha- Al Baqra 268

The Satan threateneth you with poverty and enjoineth on you sordidness.

They will put a fear in the mind of the person that after doing the charity he will be left with nothing and render him penurious. Sometimes they put a fear in the mind of the person that after doing the charity if he gets some urgent need for personal expense, then from where he will get help! Therefore they persuade the person to refrain from doing charity in the way of Allah.