Garudapurana 2.40.50

2.40.50

antreṣu nālakaṃ dadyādbālakaṃ prāṇa eva ca /
vasāyīṃ medakaṃ dadyādgomūtreṇa tu mūtrakam //

he should place a hollow stalk for the entrails, and bālaka herb for the vital breath; / he should place fat for the marrow, and urine with cow's urine;