hrdayesu

hṛdayeṣu within the heart; SB 3.13.4
hṛdayeṣu with devotees whose hearts; SB 4.9.12
antaḥ-hṛdayeṣu in the cores of the hearts; SB 6.9.42
antaḥ-hṛdayeṣu within the recesses of their hearts; SB 12.6.67
hṛdayeṣu in their hearts; Bs 5.38