I had never heard this before:
That they said (in boast), "We killed
Christ Jesus the son of
Mary, the
Messenger of
Allah";- but they killed him not, nor crucified him, but so it was made to appear to them, and those who differ therein are full of doubts, with no (certain) knowledge, but only conjecture to follow, for of a surety they killed him not:-
Nay, Allah raised him up unto Himself; and Allah is Exalted in Power, Wise;-
— Qur'an,
sura 4 (
An-Nisa)
ayat 157-158
There are claims that he was not crucified, that Allah made another look like Jesus and he was crucified, that the crucification did not take long enough for him to die and that Jesus is immortal so he could not have died.