Charak Samhita
सप्रत्यनीको जनयत्येककालमहर्निशि। दोषोऽस्थिमज्जगः कुर्यात्तृतीयकचतुर्थकौ ॥६४॥
This jwara occurs only once during day and night. [Tritiyaka and chaturthaka jwara] When the dosha afflict the asthi dhatu (bone tissue) and majja dhatu (bone marrow), they cause the tritiyaka and chaturthaka jwara respectively.
english translation
sapratyanIko janayatyekakAlamaharnizi। doSo'sthimajjagaH kuryAttRtIyakacaturthakau ॥64॥
hk transliteration by Sanscript