Sahih Bukhari
Virtues and Merits of the Prophet (pbuh) and his Companions
Volume: 004 / Book Number: 056 / Hadith Number: 689
Narrated 'Abdullah bin 'Umar:
Allah's Apostle said, "A lady was punished because of a cat which she had imprisoned till it died. She entered the (Hell) Fire because of it, for she neither gave it food nor water as she had imprisoned it, nor set it free to eat from the vermin of the earth."