parsni

pārṣṇi — the heels; SB 2.1.26
śakra-pārṣṇi-grāheṇa — who was helping Lord Indra; SB 6.18.23
pārṣṇi-grāheṇa — attacking from the rear; SB 7.2.6
pārṣṇi-grahāḥ — grasping him from behind; SB 8.2.28
pārṣṇi — of His heels; SB 10.16.31
pārṣṇi-grāham — for help; SB 10.57.14
pārṣṇi-grāhaḥ — as the rear guard; SB 10.66.12-14