Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) says: "By the One besides whom there is no other god! When a servant holds a good opinion of Allah Almighty, Allah Almighty grants him according to his opinion. The reason for this is that all good is in His hand of power."
Imam al-Tabarani recorded this narration as a mawquf narration (stopping at the Companion), and its narrators are the narrators of the Sahih, except that the narrator named al-A'mash did not live in the time of Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأدعية / 17206
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«اخرجه الطبراني فى المعجم الكبير (8772)»
Sayyiduna Mu'awiyah bin Haydah (may Allah be pleased with him) reports this saying of the Prophet (peace and blessings be upon him): "Allah Almighty says: I am as My servant thinks of Me."
Imam al-Tabarani recorded this narration; its chain contains a narrator, Yuhannas bin Ibrahim, and I do not know him. The remaining narrators of this narration are thiqat (trustworthy). Hadiths about holding a good opinion (of Allah) have already passed before this in the Book of Funerals.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأدعية / 17207
Hadith Gradingمحدثین:إسنادہ ضعیف
Hadith Takhrij«اخرجه الطبراني فى المعجم الكبير (416/19)»