274."those who spend their property by night and day, secretly and openly,
for them shall be their reward with their lord,
and no fear shall be upon them, nor shall they grieve."

commentary:
in some commentary books, like tafsir-us-safi, majma`-ul-bayan,
tafsir-ul-qurtubi, tafsir-ul-kabir by fakhr razi, it is cited that this
verse has been revealed about had¤rat ali (a.s.). once it happened that
he had only four silver coins when he spent out in charity one coin in
daytime, one coin at night, the third coin openly and the fourth coin
hiddenly in the way of allah.

" those who spend their property by night and day, secretly and openly,
for them shall be their reward with their lord,..."

but, in addition to the above mentioned occasion of revelation,
the promise of this holy verse covers all those who act similarly to that.
such people neither scare of poverty in the world, because they believe
in the promises of allah and trust in him, nor become grievous
because of charity, since they are attentive to obtaining the pleasure of
allah and what the action of giving charity will bring forth for them in
the hereafter.

in another occasion in this very current sura,1 too, the givers of
charity are stated about.

"... and no fear shall be upon them, nor shall they grieve."

1 sura al-baqarah, no. 2, verse, 262