At SB 3.8.3 the sages headed by the Kumaras, wishing to know the truth, question the Lord, the first, the god Sankarshana of unfailing sattva, seated on the earth: 'AsInam urvyAM bhagavantaM AdyaM sa~NkarShaNaM devam akuNTha-sattvam'. At SB 3.8.7 the same Lord is described as having told it to Sanatkumara.
Deity
Sankarshana
संकर्षण
The god of unfailing sattva, questioned by the sages headed by the Kumaras
The fire at the end of the age
At SB 3.11.29 the burning at the end of the age is described as the power of Sankarshana: 'tri-lokyAM dahyamAnAyAM shaktyA sa~NkarShaNAgninA / yAnty UShmaNA mahar-lokAj janaM bhR^igv-adayo arditAH' — when the three worlds burn, from Maharloka the Jana and Bhrigu and the rest, scorched by the heat, depart.
Sankarshana — vyuha of — Krishna
Sankarshana is one of the four vyuha forms of Vasudeva: 'pradyumnāyāniruddhāya namaḥ saṅkarṣaṇāya ca' (SB 1.5.37). Evidence: EXPLICIT.