عن عائشة زوج النبي ﷺ أن الحارث بن هشام سأل رسول الله كيف يأتيك الوحي فقال رسول الله ﷺ أحياناً يأتيني في مثل صلصلة الجرس وهو أشدُّه علي فيَفصِم عني وقد وعَيتُ ما قال وأحياناً يتمثل لي الملك رجلاً فيكلِّمني فأعي ما يقول قالت عائشة ولقد رأيته ينزل عليه في اليوم الشديد البَرد فيُفصم عنه وإن جبينه ليتف صد عرقاً
موطأ مالك كتاب القرآن
'Aishah, the Prophet's (SAW) wife, related that Al-Harith ibn Hisham asked the Messenger of Allah: How does inspiration come to you? The Messenger of Allah (SAW) said: Sometimes it comes to me like the ringing of bells, and this is the most intense for me, then it breaks away from me, and I remember what it said; and sometimes the angel appears to me as a man and speaks to me, and I remember what he says. 'Aishah said: I saw it coming down to him on an intensely cold day, and it broke away from him, and indeed his forehead was dripping sweat.
Muwatta Malik, The book of the Qur'an