Book 48, Number 48.4.6:

Yahya related to me from Malik from Alqama ibn Abi Alqama that his mother said, "Hafsa bint Abd ar-Rahman visited A'isha, the wife of the Prophet, may Allah bless him and grant him peace, and Hafsa was wearing a long thin head scarf A'isha tore it in two and made a wide one for her."