彼の言った事は

what he said

→ 彼
phrase Rare #26,340
what he said Means “what he said” or “the thing he said.” The は marks it as the topic of the sentence, so it is normally followed by a comment about what he said.
JA: 彼の言った事はよく分からなかった。
EN: I couldn't understand what he said at all.

彼の言った事はさっぱり分からなかった

I couldn't understand a word he said.

彼の言った事はの意味もない

What he said doesn’t mean anything.

彼の言った事はこの場合にも当てはまる

What he said applies in this case as well.

彼の言った事はたぶん本当だろう

What he said is probably true.

彼の言った事は決して本当ではない

What he said is by no means true.