Bhagavatapurana 10.6.9

10.6.9

tāṃ tīkṣṇa-cittām ativāma-ceṣṭitāṃ vīkṣyāntarā koṣa-paricchadāsivat /
vara-striyaṃ tat-prabhayā ca dharṣite nirīkṣyamāṇe jananī hy atiṣṭhatām //

9. On suddenly seeing her in their house, who looked such an excellent lady and behaved herself in a very charming fashion (like a mother) though possessed of a cruel heart like unto a sword concealed

in a smooth charming sheath, both the mothers Yasoda and Rohini, overpowered by her brilliancy, kept looking on (without questioning or preventing her).

10.6.9.p1

tasmin stanaṃ durjara-vīryam ulbaṇaṃ $ ghorāṅkam ādāya śiśor dadāv atha &

10. There, the child Krishna she placed on her horrid lap and suckled him at her breast charged with bitterest and indigestible poison and the glorious Lord, full of indignation, squeezed it very hard with His hands and sucked it along with her life.