Skandapurana 14.29.111

14.29.111

tasmātsarvaprayatnena tatra snānaṃ samācaret ..
śrāddhaṃ caivātmanaḥ śaktyā dānaṃ pārthivasattama .. .. 111 ..

Therefore, by every effort, one should perform a ritual ablution there, / and a śrāddha according to one's ability, and a gift, O best of kings.