Could you please kindly tell me if the virtue for upbringing daughters is promised even if there is only one daughter?
Yes, this includes those parents who only have one daughter too, as long as she is cared for.
In other words, one who cares for his/her only daughter will also be saved from Jahannam.
(Fathul Bari, Hadith: 5995 & Tuhfatul Bari, Hadith: 1418)
And Allah Ta’ala Knows best,
Answered by: Moulana Muhammad Abasoomar
Checked by: Moulana Haroon Abasoomar