That Allah's Messenger (ﷺ) came to her in a happy mood with his features glittering with joy, and said, "Have you not heard what the Qaif has said about Zaid and Us-ama? He saw their feet and remarked. These belong to each other." (i.e. They are father and son.)
Sahih al-Bukhari Book 61, Hadith 64
← Previous Hadith The Prophet (ﷺ) was the most generous of all the people, and he used to become more generous in Ramadan when Gabriel met him. Gabriel used to meet him every night during Ramadan to revise the Qur'an with him. Allah's Messenger (ﷺ) then used to be more generous than the fast wind.

Sahih al-Bukhari Book 61, Hadith 63 Next Hadith → I heard Ka`b bin Malik talking after his failure to join (the Ghazwa of) Tabuk. He said, "When I greeted Allah's Messenger (ﷺ) whose face was glittering with happiness, for whenever Allah's Messenger (ﷺ) was happy, his face used to glitter, as if it was a piece of the moon, and we used to recognize it (i.e. his happiness) from his face."

Sahih al-Bukhari Book 61, Hadith 65