AVŚ, 17, 1, 17.1 pañcabhiḥ parāṅ tapasy ekayārvāṅ aśastim eṣi sudine bādhamānas taved viṣṇo bahudhā vīryāṇi /

LiPur, 2, 3, 6.2 kimarthaṃ muniśārdūla tapastapasi duścaram //

SkPur (Rkh), Revākhaṇḍa, 103, 46.2 svargamokṣasutasyārthe tapastapasi duṣkaram //