“We are more inclined to marry [your] sister the infanta, Isabella, than anyone else because there is no daughter of a king as ready as her.”
Help us to complete the source, original and additional information
Charles V, Holy Roman Emperor 21
Holy Roman Emperor 1500–1558Related quotes

attributed in page 85 https://books.google.ca/books?id=QSk0DwAAQBAJ&pg=PA85 of 2017 book by Doreen Chilia-Jones "Say What?: 670 Quotes That Should Never Have Been Said"
although no further source details are presence in the above book, its presence in the fourth (1990) edition of the "Tahrirolvasyleh" was alleged since December 2004 https://web.archive.org/web/20050106170121/http://www.militantislammonitor.org/article/id/348
Attributed

“149. Marry your sonne when you will, your daughter when you can.”
Jacula Prudentum (1651)
“one of the sisters started shaving her legs and marrying tax inspectors, so she was no good.”
Source: Island of the Aunts