The Lord says in Bhagavad-gita (BG 15.15), sarvasya caham hrdi sannivisto mattah smrtir jnanam apohanam ca: "I am (Krsna) seated in everyone's heart, and from Me come remembrance, knowledge and forgetfulness"

Expressions researched:
"the Lord says in Bhagavad-gītā" |"sarvasya cāhaṁ hṛdi sanniviṣṭo mattaḥ smṛtir jñānam apohanaṁ ca" |"I am seated in everyone's heart, and from Me come remembrance, knowledge and forgetfulness"

Srimad-Bhagavatam

SB Canto 8

Nothing is hidden from the Supreme Personality of Godhead, for He is in everyone's heart. Indeed, the Lord says in Bhagavad-gītā (BG 15.15), sarvasya cāhaṁ hṛdi sanniviṣṭo mattaḥ smṛtir jñānam apohanaṁ ca: "I am seated in everyone's heart, and from Me come remembrance, knowledge and forgetfulness." Whatever happened had taken place under the direction of the Supreme Personality of Godhead, and therefore there was no cause to be sorry or ashamed.

SB 8.12.37, Translation and Purport

Seeing Lord Śiva unagitated and unashamed, Lord Viṣṇu [Madhusūdana] was very pleased. Thus He resumed His original form and spoke as follows.

Although Lord Śiva was aghast at the potency of Lord Viṣṇu, he did not feel ashamed. Rather, he was proud to be defeated by Lord Viṣṇu. Nothing is hidden from the Supreme Personality of Godhead, for He is in everyone's heart. Indeed, the Lord says in Bhagavad-gītā (BG 15.15), sarvasya cāhaṁ hṛdi sanniviṣṭo mattaḥ smṛtir jñānam apohanaṁ ca: "I am seated in everyone's heart, and from Me come remembrance, knowledge and forgetfulness." Whatever happened had taken place under the direction of the Supreme Personality of Godhead, and therefore there was no cause to be sorry or ashamed. Although Lord Śiva is never defeated by anyone, when defeated by Lord Viṣṇu he felt proud that he had such an exalted and powerful master.