四天下(sì tiān xià) “four realms under heaven, (a world consisting of) four continents”
not found at HD. 3.572.; not found at DK. 3.34.;
4a5.其最後佛未出家時,有八王子 ………… 是八王子威德自在,各領四天下(p)
K. 19.6.catvāro mahādvīpāḥ; Z. 66a12.四域天下;