1. Various Incarnations - 3 Canto 1 Chapter 3 Text 16-19
Srimad Bhagavatam
Various Incarnations - 3
Canto 1 Chapter 3 Text 16-19

2. Text 16
surāsurāṇām udadhiṁ mathnatāṁ mandarācalam dadhre kamaṭha-rūpeṇa pṛṣṭha ekādaśe vibhuḥ The eleventh incarnation of the Lord took the form of a tortoise whose shell served as a pivot for the Mandarācala Hill, which was being used as a churning rod by the theists and atheists of the universe.

3. Kurma/Kamaṭha incarnation
Once both the atheists and the theists were engaged in producing nectar from the sea so that all of them could become deathless by drinking it. At that time the Mandarācala Hill was used as the churning rod, and the shell of Lord Tortoise, the incarnation of Godhead, became the resting place (pivot) of the hill in the seawater.

4. Kurma/Kamaṭha incarnation

5. Text 17
dhānvantaraṁ dvādaśamaṁ trayodaśamam eva ca apāyayat surān anyān mohinyā mohayan striyā In the twelfth incarnation, the Lord appeared as Dhanvantari, and in the thirteenth He allured the atheists by the charming beauty of a woman and gave nectar to the demigods to drink.

6. Danvantari & Mohini incarnations
In the twelfth incarnation, the Lord appeared as Dhanvantari, and in the thirteenth He allured the atheists by the charming beauty of a woman and gave nectar to the demigods to drink.

7. Text 18
caturdaśaṁ nārasiṁhaṁ bibhrad daityendram ūrjitam dadāra karajair ūrāv erakāṁ kaṭa-kṛd yathā In the fourteenth incarnation, the Lord appeared as Nṛsiṁha and bifurcated the strong body of the atheist Hiraṇyakaśipu with His nails, just as a carpenter pierces cane.

8. Nṛsiṁha incarnation
In the fourteenth incarnation, the Lord appeared as Nṛsiṁha and bifurcated the strong body of the atheist Hiraṇyakaśipu with His nails, just as a carpenter pierces cane.

9. Text 19
pañcadaśaṁ vāmanakaṁ kṛtvāgād adhvaraṁ baleḥ pada-trayaṁ yācamānaḥ pratyāditsus tri-piṣṭapam
In the fifteenth incarnation, the Lord assumed the form of a dwarf-brāhmaṇa [Vāmana] and visited the arena of sacrifice arranged by Mahārāja Bali. Although at heart He was willing to regain the kingdom of the three planetary systems, He simply asked for a donation of three steps of land.

10. Vāmana incarnation
The Almighty God can bestow upon anyone the kingdom of the universe from a very small beginning, and similarly, He can take away the kingdom of the universe on the plea of begging a small piece of land.