 The best du'a is the du'a or the day of Arafah. The best du'a is the day of Arafah is the day that when Adam, a.s., lost his wife, Bibi Hawa. Lost his wife. In the narration, it's 40 years. He was searching for her. After they were thrown away, thrown down from the heaven into the earth, they were separated. And his du'a was accepted on the Arafah, on the plane of Arafah. And he found Bibi Hawa on Jablur Rahma, the mountain of mercy. This is what it's called, Jablur Rahma. The mercy of Allah descended and he found his partner, his beloved.