The Quran

157

وَقَولِهِم إِنّا قَتَلنَا المَسيحَ عيسَى ابنَ مَريَمَ رَسولَ اللَّهِ وَما قَتَلوهُ وَما صَلَبوهُ وَلٰكِن شُبِّهَ لَهُم ۚ وَإِنَّ الَّذينَ اختَلَفوا فيهِ لَفي شَكٍّ مِنهُ ۚ ما لَهُم بِهِ مِن عِلمٍ إِلَّا اتِّباعَ الظَّنِّ ۚ وَما قَتَلوهُ يَقينًا

(Saheeh International)

And [for] their saying, "Indeed, we have killed the Messiah, Jesus, the son of Mary, the messenger of Allāh." And they did not kill him, nor did they crucify him; but [another] was made to resemble him to them. And indeed, those who differ over it are in doubt about it. They have no knowledge of it except the following of assumption. And they did not kill him, for certain.¹

Another meaning is "And they did not kill him, being certain [of his identity]," i.e., they killed another assuming it was Jesus (upon whom be peace).