What is umm ishaq bint talhah?

As an AI language model, I don't have access to all the information on the internet. However, I can tell you that Umm Ishaq bint Talhah was a Sahaba woman, which means she was a female companion of Prophet Muhammad (peace be upon him). She was married to Umar ibn Khattab, who later became the second caliph of Islam. She was known for her piety, wisdom, and knowledge of the Quran. She was also known for her generosity and kindness towards the poor and needy. Umm Ishaq bint Talhah passed away during the caliphate of Umar ibn Khattab.