Bismillahir Rahmaanir Raheem
Hazrat Aayesha (Radhiyallahu ‘Anha) said:
"One night Rasulullah (Sallallaahu ‘alaihi wasallam) woke up and performed Salaah. He prolonged the Sajdah to such an extent that I wondered whether he had passed away. Seeing this, I got up and shook his foot. Perceiving movement, I felt at ease.
When Rasulullah (Sallallaahu ‘alaihi wasallam) lifted his head from Sajdah and completed his Salaah, he said: "O Humairah (RA)! Did you think that the Nabi (Sallallaahu ‘alaihi wasallam) had deceived you?"
I replied in the negative and said: "I swear in the name of Allah, due to the length of your Sajdah I thought that you had passed away. "
Nabi (Sallallaahu ‘alaihi wasallam) said: "Do you know what night this is?"
I said: "Allah and his Rasul (Sallallaahu ‘alaihi wasallam) know best."
He said: "This is the fifteenth night of Sha'baan, Allah looks at His servants in this night and forgives those who seek forgiveness, shows mercy upon those who seek mercy and delays the decision of those who harbour feelings of hatred for others”
It is also mentioned in this narration that Hazrat Aisha (Radhiyallahu 'Anah) heard Nabi (Sallallaahu ‘alaihi wasallam) reading this Dua in his Sajdah: