The Messenger of Allah ﷺ said, "On the night I was taken on the Night Journey, I passed by Musa at the red sand dune, and he was standing in his grave, praying."
أن رسول الله ﷺ قال: مررت على الله موسى ليلة أسري بي عند الكثيب الأحمر، وهو قائم يصلي في قبره.