English translation
[2771] 215 - (...) It was narrated that Abû Sa'eed Al-Khudrî [may Allâh be pleased with them] said: "The Messenger of Allâh ﷺ observed I'tikâf during the first ten days of Ramaḍân, then he observed I'tikâf during the middle ten days, in a Turkish tent that had a reed mat over the door. He took hold of the mat and put it in the corner of the tent, then he put his head out and spoke to the people, who drew close to him. He said: 'I observed I'tikâf during the first ten days, seeking this night, then I observed I'tikâf during the middle ten. Then someone came to me and I was told that it is in the last ten nights, so whoever among you wants to observe I'tikâf, let him do so.' So the people observed I'tikâf with him. And he said: 'I was shown that it is an odd-numbered night, and that I was prostrating the following morning in mud and water.' On the morning of the twenty-first, when he got up to pray Ṣubh, it had rained and the Masjid had leaked. When he came out after praying Ṣubh, there was water and mud on his forehead and on the tip of his nose, and that was the night of the twenty-first, one of the last ten nights."