There is considerable evidence that the Hevajra and Cakrasamvara tantras borrow significant portions from Saiva sources. The text Cakrasamvara and its commentaries have revealed numerous attempts by the Buddhists to enlarge and modify it, both to remove references to Saiva deities and to add more Buddhist technical terminology.
theRe is consideRable evidEnce that The heVajra ANd cakRasaMvARa tanTraS bORrow significant PoRtioNs FroM SAIVa SOuRcES. thE tExt CAKrASamvAra anD iTS commentarIEs haVE reVeAleD numERous aTtempts bY the budDhiSts to enLArGE AnD MOdiFy IT, boTh TO reMove refEreNceS tO SaIvA DEItIeS anD to ADd more Buddhist technIcal termINoLogY.