The Prophet made incumbent on every male or female

Obligatory Charity Tax After Ramadaan (Zakat ul Fitr)
Bukhari :: Book 2 :: Volume 25 :: Hadith 587
Narrated Nafi':
Ibn 'Umar said, "The Prophet made incumbent on every male or female, free man or slave, the payment of one Sa' of dates or barley as Sadaqat-ul-Fitr (or said Sadaqa-Ramadan)." The people then substituted half Sa' of wheat for that. Ibn 'Umar used to give dates (as Sadaqat-ulFitr). Once there was scarcity of dates in Medina and Ibn 'Umar gave barley. 'And Ibn 'Umar used to give Sadaqat-ul-Fitr for every young and old person. He even used to give on behalf of my children. Ibn 'Umar used to give Sadaqatul-Fitr to those who had been officially appointed for its collection. People used to give Sadaqat-ul-Fitr (even) a day or two before the 'Id.
Virtues of Madinah
Bukhari :: Book 3 :: Volume 30 :: Hadith 91
Narrated Anas:
The Prophet said, "Medina is a sanctuary from that place to that. Its trees should not be cut and no heresy should be innovated nor any sin should be committed in it, and whoever innovates in it an heresy or commits sins (bad deeds), then he will incur the curse of Allah, the angels, and all the people." (See Hadith No. 409, Vol 9).
Bukhari :: Book 3 :: Volume 30 :: Hadith 92
Narrated Anas:
The Prophet came to Medina and ordered a mosque to be built and said, "O Bani Najjar! Suggest to me the price (of your land)." They said, "We do not want its price except from Allah" (i.e. they wished for a reward from Allah for giving up their land freely). So, the Prophet ordered the graves of the pagans to be dug out and the land to be levelled, and the date-palm trees to be cut down. The cut date-palms were fixed in the direction of the Qibla of the mosque.