Can a dream be interpreted in which a lost son appears in a mosque despite conflicting news about his fate, and what are the implications of reopening the grave after his burial?

We ask Allah to relieve your distress and remove your worry. As for your son, strive to inquire about him. If you lose hope of finding him alive, then reckon him with Allah. Know that the reward for patiently enduring the loss of a child is immense. For if a servant's child dies, and the servant praises Allah and says "Innā lillāhi wa innā ilayhi rājiʿūn" (To Allah we belong and to Him we shall return), Allah will build for him a house in Paradise called the House of Praise.