What is the ruling on looking at non-mahram women without lust if their hair is uncovered, and is it permissible to analogize this to the situation of slave women during the Prophetic era?

A woman's hair is considered 'awrah' (that which must be covered), and she must conceal it. Non-mahram (definition) men must lower their gaze from it. The evidence for this is the general religious texts commanding women to cover themselves, including Allah's saying: "They should draw over themselves some of their outer garments" (Quran 33:59), and His saying: "And let them draw their headcovers over their bosoms" (Quran 24:31). The jurists have agreed that it is impermissible to look at a non-mahram woman's hair or for her to expose it. As for drawing an analogy with slave women, this contradicts the well-known distinction between slave women and free women. Leaving the hijab (definition) was a concession for slave women due to their need to uncover themselves because of their service, and the hijab is specific to free women, not slave women.