Praise be to Allaah.
What was narrated from the Prophet (peace and blessings of Allaah be upon
him) concerning staying up at night during the last ten nights of Ramadaan is that those nights should be spent in prayer and dhikr.
Charity during Ramadaan is better than charity at other times, but we do not know
of anything in the Sunnah to indicate that giving charity in the last ten days is better.
But the scholars stated that righteous deeds are better when done at times of
virtue, and undoubtedly the last ten nights of Ramadaan are better than any other nights, because Laylat al-Qadr is among them, which is better
than a thousand months.
Whatever the case, what is prescribed for the Muslim is to give a great deal of
charity throughout Ramadaan. The Prophet (peace and blessings of Allaah be upon him) was the most generous of people and he was at his most
generous during Ramadaan. Narrated by al-Bukhaari, 6; Muslim, 2308
And Allaah knows best.