There is no such thing as an objective religious text. They each explain a series of largely historical events through the perspective of the culture that wrote it. From there you examine other sources to determine if evidence corroborates the texts, sort of like a fingerprint. But as far as wisdom texts, there's no way to scientifically prove that. I can't prove that murder is wrong. I can point to various patterns of societies, or make hypotheses about how certain behavior is conducive to a thriving society, but fundamentally we don't currently have an objective way to derive morality.