Srimad-Bhagavatam: Canto 2 - Chapter 1 - Verse 47
Sanskrit:
परिमाणं च कालस्य कल्पलक्षणविग्रहम् ।यथा पुरस्ताद्व्याख्यास्ये पाद्मं कल्पमथो शृणु ॥ ४७ ॥
ITRANS:
parimāṇaṁ ca kālasyakalpa-lakṣaṇa-vigrahamyathā purastād vyākhyāsyepādmaṁ kalpam atho śṛṇu
Translation:
O King, I shall in due course explain the measurement of time in its gross and subtle features with the specific symptoms of each, but for the present let me explain unto you the Pādma-kalpa.
Purport:
The present duration of a kalpa of Brahmā is called the Varāha-kalpa or Śvetavarāha-kalpa because the incarnation of the Lord as Varāha took place during the creation of Brahmā, who was born on the lotus coming out of the abdomen of Viṣṇu. Therefore this Varāha-kalpa is also called Pādma-kalpa, and this is testified by ācāryas like Jīva Gosvāmī as well as Viśvanātha Cakravartī Ṭhākura in pursuance of the first commentator, Svāmī Śrīdhara. So there is no contradiction between the Varāha and the Pādma-kalpa of Brahmā.