Shiva Purana
प्रक्षालितांघ्रिराचम्य पिण्डस्थानं व्रजेत्ततः ॥ आसीनः प्राङ्मुखो मौनी प्राणायामत्रयं चरेत्॥ ७० ॥
Washing his feet and performing the Ācamana he shall approach the Piṇḍas. Facing the cast he shall sit silently and perform Prāṇāyāma thrice.
english translation
prakSAlitAMghrirAcamya piNDasthAnaM vrajettataH ॥ AsInaH prAGmukho maunI prANAyAmatrayaM caret॥ 70 ॥
hk transliteration by Sanscript