तदर्थम् for that purpose, उपकल्पितैः arranged, रामाभिषेकसम्भारैः all preparations for Rama's consecration, मृतस्य of the dead, मे to me, रामः Rama, सलिलक्रियाम् the funeal rites it offering water to the dead, कारयितव्यः should be done.

With the materials already collected for the consecration of Rama he will perform my funeral rite of offering water to the dead.