俱舍論疏 16.122

16.122

論「又所殺者至能殺得罪」，汝引火為例，無心觸火而被火燒。亦應同火燒其所合，所殺得罪，非能殺人。

On the Śāstra's "Furthermore, the one killed... to ...the killer incurs the sin": You cited fire as an example, where one touches fire without intention and yet is burned by the fire. Then, just as fire burns that with which it comes into contact, the one who is killed should incur the sin, not the person who kills.