Amr bin 'Alqama bin Waqqas عمرو بن علقمة بن وقاص الليثي · The Book of the Sunnah

We said to Zaid bin Arqam: 'Tell us a Hadith from the Messenger of Allah (ﷺ).' He said: 'We have grown old and have forgotten, and (narrating) Ahadith from the Messenger of Allah (ﷺ) is difficult (not a simple matter).'"