The prescribed punishment for a murtadd

If a sane person who has reached puberty voluntarily apostatizes from Islam, he deserves to be punished. In such a case, it is obligatory for the caliph (or his representative) to ask him to repent and return to Islam. If he does, it is accepted from him, but if he refuses, he is immediately killed

IslamOnline (mouthpiece of Ken Livingstone's non-gay hug-chum, Yusuf al-Qaradawi)

Teacher and cleric tells believers to kill apostate

"He is condemned to death. Whosoever is in position to kill him, he should do so"

Abdul Rashid Ghazi, cleric at the Red Mosque, Islamabad, and vice principal of two madrassahs in the city.