Assalamu’alaikum wa rahmatullahi wa barakatuhu,
She was Naseebah bint Ka’b Al-Maziniyah Al-Ansariyah Radiyallahu Anha.
Known also as Umm ‘Ammarah or Nusaybah bint Ka’b.
You can see and read the detailed story of her life and the battle of Uhud where this particular incident actually happened from this link:
I hope this helps, in sha Allah.
May Allah Azza Wa Jall always bless you. Amin
-Umm Umar Khaled