Question Summary:
Should a Muslim woman observe Hijab from her khala’s husband?

Question Detail:

what the saying says  about muslim woman should do pardah from their khala's nd phuphos husbands ?

Answer :

In the Name of Allah, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-rahmatullāhi wa-barakātuh.
We do not know what saying you are referring to.
In principle, the Khala’s husband and Phupho’s husband are Ghair Mahram (Unless they marry a Mahram, for example, the Khala marries one’s Chacha). As such, the laws of Hijāb should be observed in front of them.[1]
And Allah Ta’āla Knows Best
Hisham Dawood
Student, Darul Iftaa
Chicago, USA
Checked and Approved by,
Mufti Ebrahim Desai.
www.daruliftaa.net