Umar bin Abd al-Aziz (may Allah have mercy on him) said: The righteous woman Khawlah bint Hakim (may Allah be pleased with her) related that the Messenger of Allah (peace and blessings be upon him) said: "Children are a cause of grief (for their parents), a cause of cowardice, a cause of ignorance and a cause of miserliness. And indeed, the last mighty assault that Allah, the Mighty and Majestic, carried out was at Wajj (Ta'if)."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20984