Ashtangasamgraha 19.29

19.29

āgantuṃ śamayeddoṣaṃ sthāninaṃ pratikṛtya vā |

tejo yatsarvadhātūnāmojastat paramucyate |

mṛdu somātmakaṃ śuddhaṃ raktamīṣatsapītakam ||

tiktakānāmanyatamaṃ vā ||

One should pacify the foreign doṣa, or having first counteracted the resident doṣa. / That which is the fiery essence of all the bodily tissues is called the supreme ojas; / it is gentle, watery in nature, pure, red, and slightly yellowish.
Or any one of the bitter [ghees].