Devi Satyabhama being the incarnation of Bhumi devi is provided in different scriptures including Brahma Vaivarta purana, Garga samhita, Padma Purana,krishnoupanishad, and Mahabharata Tatparya Nirnaya.
Brahma Vaivarta Purana(6.141-150):
141.Lord Sesa, the master of the universes, will go to Devaki’s womb. Then Yogamaya will pull (sankars) Him into Rohini’s womb. For this reason He will be called Sankarsana.
142.Ganga will come to the earth in a partial incarnation as Yamuna. Tulasi will appear in a half-incarnation as princess Laksmana.
143.Saintly Savitri, the mother of the Vedas, will be named Nagnajiti. Vasundhara will become Satyabhama. Goddess Sarasvati will become
Tulasi will take birth as Satya and Vasundhara as Satyabhama.
- Padma Puran (Uttara kanda chapter 29):
Śrī Rudra said:
The glorious daughter of Satrājit, named Satyā, born with a portion of the Earth, was another wife of Kṛṣṇa. The glorious daughter of the Sun, named Kālindī, was his third wife.
The "mercy" was born as mother Rohini and the “mother earth ” was born
as Sathya Bhama.
- Mahabharata Tatparya Nirnaya 20.60:
“Śrīmati Rukmiṇī-devī and Śrīmati Satyabhāmā devi are Śrī-Śaktis:
Śrī-Devi and Bhu-Devi (respectively)”.