مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3739
Musnad of Abdullah bin Mas'ood
It was narrated that ‘Abdullah (رضي الله عنه) said: We regarded verses (of Qur'an) at the time of the Prophet (ﷺ) as blessings, but you regard them as a cause of alarm.
Musnad Ahmad 3762A saheeh hadeeth, this is a hasan isnad]