In kitab al sunnah by Ibn abi Asim, Page 202-203 we read:
Abu Bakr narrated to us; ʿAbdah ibn Sulaymān and Abū Usāmah narrated to us, from Misʿar, from ʿAbd al-Malik ibn Maysarah, from Muṣʿab ibn Saʿd, from Muʿādh, that the Messenger of Allah ﷺ said:
“Whatever he sees in his sleep and in his wakefulness is true.”
Its chain of transmission (isnād) is authentic according to the conditions of the two Shaykhs (al-Bukhārī and Muslim), and it is mawqūf (stopped at the Companion).
Alkarbala