Something to ponder on

The word Judaism is not found in the Old Testament, nor is Judaism called a Religion in the Old Testament so what religion did Moses present to the children of Israel  I.e Nation to follow?

Now one may say just because the Old Testament doesn't use the word Judaism doesn't mean people wasn't aware of it, take for instance the New Testament we find Judaism in there. But notice Judaism is only spoken by Paul? Not even Jesus himself nor the gospels uttered such a word?. Secondly the questions authenticity depends on the Old Testament the entire codex has no mention of such a religion how comes ? 

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Here comes the blow 

What religion did the prophets of the Old Testament follow is not mentioned, nor does the Old Testament distinguish their belief status other then calling them righteous, upright, perfect, servants etc... Now what makes you say they did not follow Islam as their religion since being righteous, upright, prefect is following the right path o.e monotheism which is the religion of ISLAM...

Christians say there is no Islam in the bible nor is Judaism found in the Tanack shall we conclude Moses and his people did not have a religion?