The Entire Knowledge is in Four Words

Allah inspired Adam (pbuh) with: "I will gather the entire knowledge for you in four words. One for Me. One for You. One between Me and you. One between you and people.

As for the one that is for Me: Worship Me without making Me any peer.

As for the one that is for you: I reward you for your conduct with what you need the most

As for the one that is between Me and you: You have to supplicate and I shall respond.

As for the one that is between you and people: Accept for people what you accept for yourself."

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Al-Khisal Book.