ask for (someone's) hand in marriage

Translations
просить (чьей-то) руки в браке
He decided to ask for her hand in marriage during their vacation.
Он решил попросить её руки в браке во время их отпуска.
Definitions
To formally request permission to marry someone, often by asking the person directly or by seeking approval from their family, traditionally the person's parents.
Words
ask

verb
просить
for

preposition
о
someone

pronoun
чьей-то
hand

noun
руки
in

preposition
в
marriage

noun
браке