The Rambam wrote to his son that his hair turned white, because of the worries he had , marrying off his daughter.
The Ksav Sofer explains the pasuk “Vahashem
Beirach es Avraham BAKOL.
One pshat in the gemoro is, he had no daughters.
Had he have had a daughter, even with all his money, he would of not have been completely blessed , because of the shidduch worries.