It was narrated that Abu Aqrab said:

I went to Ibn Mas'ood one morning in Ramadan and I found him sitting on the roof of his house. We heard his voice and he was saying: Allah spoke the truth and His Messenger conveyed the message. We said: We heard you saying, Allah spoke the truth and His Messenger conveyed the message. He said: Verily the Messenger of Allah (ﷺ) said: “Lailatal-Qadr is halfway through the last seven nights of Ramadan, and on that morning the sun rises clear, with no rays." I looked at it and I found it as the Messenger of Allah (ﷺ) said.