"The Messenger of Allah ﷺ was asked about Waraqah. Khadijah said to him: 'He believed in you, but he died before your advent.' So the Messenger of Allah ﷺ 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.'" (Using translation from Tirmidhī 2288)
عَنْ عَائِشَةَ سُئِلَ رَسُولُ اللَّهِ ﷺ عَنْ وَرَقَةَ فَقَالَتْ لَهُ خَدِيجَةُ إِنَّهُ كَانَ صَدَّقَكَ وَلَكِنَّهُ مَاتَ قَبْلَ أَنْ تَظْهَرَ فَقَالَ رَسُولُ اللَّهِ ﷺ «رَأَيْتُهُ فِي الْمَنَامِ وَعَلَيْهِ ثِيَابٌ بِيضٌ وَلَوْ كَانَ مِنْ أَهْلِ النَّارِ لَكَانَ عَلَيْهِ لِبَاسٌ غَيْرُ ذَلِكَ»