、。
The law says that all people are equal.
Literal
Law [topic-は], all [possessive-の] people [topic-は] equal-[assertion-だ] [quotative-と] is-saying-[ongoing-ている]
Two topics stacked: the outer 法律は sets 'the law' as what's being discussed, and the inner すべての人は is the topic of the quoted content. と言っている is a stock phrase for 'states that, says that' — the ている here marks an enduring statement, not a current utterance.