I never saw anyone who smiled more often than the Messenger of Allah ﷺ.
حدثنا قتيبة حدثنا ابن لهيعة عن عبيد الله بن المغيرة
ما رأيت أحدا أكثر تبسما من رسول الله ﷺ
[Hasan] Ahmad narrated it: 4/190, 191, from the hadith of Ibn Lahia through the same route, and the hadith has corroborating narrations, including the one that follows.