Umbusi woMbuso waseRoma okuthiwa nguKhesari Agastu usebeke umlayo wokuthi umuntu wonke abhalise ibizo lakhe. Yikho sekumele uJosefa loMariya baye edolobheni leBhethilehemaa lapho uJosefa azalelwa khona. Idolobho lelo liseningizimu.

Kulabantu abanengi eBhethilehema abazobhalisa amabizo abo. UJosefa loMariya baswela indawo yokuhlala baze baye esibayeni esilabobabhemi lezinye izifuyo. UJesu uzalelwa lapho, futhi uMariya umgoqela ngamalenjana abesembeka emkolweni lapho okudlela khona izifuyo.

Mhlawumbe uNkulunkulu nguye owenza ukuthi uKhesari Agastu abeke umlayo wokubhalisa. Lokhu kwakuzakwenza ukuthi uJesu azalelwe edolobheni leBhethilehema lapho okwakudabuka khona ukhokho wakhe iNkosi uDavida. IMibhalo yayivele ikhulumile kudaladala ukuthi uMbusi okwakuthenjiswe ukuthi uzakuba khona wayezazalelwa ngaphi.​—UMikha 5:2.

Lamuhla abantu abanengi bacabanga ukuthi uJesu wazalwa mhlaka 25 December. Kodwa ngenyanga le izulu liyabe lisina futhi kuyabe kuqanda eBhethilehema. Kwesinye isikhathi kuba longqwaqwane, yikho kwakungeke kwenzakale ukuthi abelusi babe besemlageni ebusuku lemihlambi yabo ngesikhathi leso. Kanti njalo kukhanya umbusi weRoma wayengeke atshele abantu laba ababelengqondo yokumvukela ukuthi bayebhalisa bona bezahamba okwamalanga amanengi ngapha umkhathi ungemuhle. Yikho kumele ukuthi uJesu wazalwa ngo-October.