Maliks Muwatta Book 028, Hadith Number 053.

Section : Marriage in General.

Yahya related to me from Malik from Abu'z-Zubayr al-Makki that somebody asked a man for his sister in marriage and the man mentioned that she had committed fornication. Umar ibn al-Khattab heard about it and he beat the man or almost beat him, and said, "What did you mean by giving him such information?"