Wa `alaykum As-Salamu wa Rahmatullahi wa Barakatuh

Allah says what means,

{And the Qawa’id among women who do not hope for marriage, it is no sin on them if they discard their (outer) clothing in such a way as not to show their adornment. But to refrain is better for them. And Allah is all-Hearer, all-Knower.} (An-Nur 24: 60)

The great scholar of Tafsir, Imam Ibn Kathir writes in his famous exegesis (tafsir) of the Qur’an:

“The meaning of “Qawa’id” is: those women who no longer think that they can bear children, and the meaning of “who do not hope for marriage” is that they no longer have any desire for marriage. Other commentators have stated the meaning as: “Those women from whom desire and sexual passion is not (typically) acquired.” (Tafsir Ibn Kathir, 3/406)

The meaning of “discarding their garment” as explained by Imam Ibn Kathir narrating from Ibn Abbas and others is: “The Jilbab or Rida (outer clothing)”. Meaning, old women do not have to cover themselves with the outer garment under the condition that they do not adorn themselves.

The great Hanafi scholar and Mufassir, Imam Abu Bakr al-Jassas writes in his book Ahkam al-Qur’an:

“There is no difference of opinion amongst the scholars, in that an old woman’s hair is part of her nakedness (awrah), thus it will not be permissible for a non-Mahram to look at the hair of an old woman. If she performed her Salat with her hair exposed, her Salat will be invalid. The meaning here is that, she has to cover her hair, however it is permissible for her to discard the cloak, and expose her face and hands because desire is not gained by looking at her.”

From the above, we can conclude that the Hijab is also necessary for the elderly. However, it is permissible for old women to keep their face and hands exposed and not wear the outer cloak, provided they do not adorn themselves and there is no fear of Fitna.

Almighty Allah knows best.