2644、“因为在他年老的时候，我给他生了一个儿子”表示当日子完满时，这事就成就了。这从对几乎相同的话（21:2）的解释清楚可知（对此，参看2621-2624节）。
Potts(1905-1910) 2644
2644. For I have borne a son to his old age. That this signifies that this was done when the days were fulfilled, is evident from the explication of nearly the same words in the second verse (as to which see n. 2621-2624).
Elliott(1983-1999) 2644
2644. 'For I have borne [him] a son in his old age' means that this was accomplished when the days had been completed. This is clear from the explanation of almost the same words in verse 2, dealt with in 2621-2624.
Latin(1748-1756) 2644
2644. Quod `quia peperi filium senectuti illius' significet quod hoc fieret cum dies completi essent, constat ab explicatione eorundem paene verborum in versu 2, de quibus n. 2621-2624.