An early example is Newton's law of universal gravitation.
Isaac Newton postulated his inverse-square law without further speculation, sayingI have not as yet been able to discover the reason for these properties of gravity from phenomena, and I do not feign hypotheses.
For whatever is not deduced from the phenomena must be called a hypothesis; and hypotheses, whether metaphysical or physical, or based on occult qualities, or mechanical, have no place in experimental philosophy.
In this philosophy particular propositions are inferred from the phenomena, and afterwards rendered general by induction.
[1]this hypothesis without further reasoning is referred as Newton's hypotheses non fingo.