Masrouq bin al-Ajda' مسروق بن الأجدع · Chapters On Dreams

"The Messenger of Allah (s.a.w) was asked about Waraqah. Khadijah said to him: 'He believed in you, but he died before your advent.' So the Messenger of Allah (s.a.w) said: 'I saw him in a dream, and upon him were white garments. If he were among the inhabitants of the Fire then he would have been wearing other than that.'"