Volume 7, Book 62, Number 75:
Narrated Abdullah bin Umar:
“When Hafsa became a widow,” Umar said, “I met Abu Bakr and said to him, ‘If you wish I will
marry Hafsa bint ‘Umar to you.’ I waited for a few days then Allah’s Apostle asked for her hand. Later
Abu Bakr met me and said, ‘Nothing stopped me from returning to you concerning your offer except
that I knew that Allah’s Apostle had mentioned (his wish to marry) her, and I could never let out the
secret of Allah’s Apostle . If he had left her, I would have accepted her.’ “