But John relates that Jesus bore His own cross, from which is understood that He was Himself carrying His cross, when He went forth to that place which is called Calvary; but as they journeyed Simon was forced into the service on the road, and the cross was given him to carry as far as that place.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: de Con. Ev. lib. iii. c. 10.