Riyad as-SalihinChapter 4Hadith 160
Full Sharh — Riyad as-Salihin 160
وعنه قال: قال رسول الله صلى الله عليه وسلم: "من رآني في المنام فسيراني في اليقظة -أو كأنما رآني في اليقظة- لا يتمثل الشيطان بي" ((مُتَّفَقٌ عَلَيهِ)).
English Translation
Abu Hurairah (May Allah be pleased with him) reported:: Messenger of Allah (ﷺ) said, "He who sees me in his dream will see me in his wakefulness (or he (ﷺ) may have said it is as though he has seen me in a state of wakefulness), for Satan does not appear in my form.".
Source
Riyad as-Salihin(رياض الصالحين)
The Book of the Etiquette of Sleeping, Lying and Sitting etc
Hadith Number
160