The most conclusive prove that "toledot" is at the beginning of a section is Genesis 25:19, which says is it the account of Isaac. The immediately following section speaks of Isaac’s children. The immediately preceding section speaks of Ishmael and has nothing whatsoever to do with Isaac.
Uthibitisho wa hakika zaidi kuwa "toledot" inapaswa kuwa mwanzoni mwa kifungu ni Mwanzo 25:19, ambayo inasema ni maelezo ya Isaka. Kifungu kinachofuata kinaongelea watoto wa Isaka. Kifungu kinachotangulia kinamwongelea Ishmael na hakihusiani na Isaka kwa namna yoyote ile.