The Messenger of Allah ﷺ said, "Umm Salama, do not hurt me concerning Ayesha. By Allah, the revelation has never come to me while I was under the blanket of any of you except hers."
أخبرنا أبو بكر بن إسحق الصغاني قال حدثنا شاذان قال حدثنا حماد بن زيد عن هشام بن عروة عن أبيه
قال رسول الله ﷺ يا أم سلمة لا تؤذيني في عائشة فإنه والله ما أتاني الوحي في لحاف امرأة منكن إلا هي
Bukhari narrated it in "Gifts and Their Merit, and Encouragement Toward Them," chapter "One Who Gives a Gift to His Companion," etc., hadith no. 2581, from the hadith of Hisham with the same, at length. It is also in Kubra, hadith no. 8897.