It is useful to compare the order that was requested vs the one that was provided. I don't find the text of the ICJ ruling available yet, maybe it will be posted here when it is ready.

They basically said about 6 different ways that Israel has to refrain from genocide, stop genocide, etc, but not "ceasefire".

Transcript of South Africa's submissions regarding provisional measures:

  1. If any military operation, no matter how carefully it is carried out, is carried out pursuant to an intention to destroy a “people”, in whole or in part, it violates the Genocide Convention and it must stop. That is why all military operations capable of violating the Genocide Convention must cease.

(And Transcript of Israel's submissions regarding provisional measures in case you want to check something there.)