Matendo ya Mitume 7 : 8 Acts chapter 7 verse 8

Akampa agano la tohara; basi Ibrahimu akamzaa Isaka, akamtahiri siku ya nane. Isaka akamzaa Yakobo. Yakobo akawazaa wale kumi na wawili, wazee wetu.
soma Mlango wa 7

He gave him the covenant of circumcision. So Abraham became the father of Isaac, and circumcised him the eighth day. Isaac became the father of Jacob, and Jacob became the father of the twelve patriarchs.