Revākhaṇḍa of the Skandapurāṇa manuscripts (RKS) 87.34

87.34

evaṃ duḥkhārjitaṃ puṇyaṃ śūdre gacchati nānyathā /
lakṣadākṣiṇyalābhāya pradānaṃ cāparādhakam //

Thus merit acquired with sorrow goes to the śūdra, not otherwise.
A gift given [merely] to gain fame and favor is sinful;