See the Bukhari Hadiths vol.3 book 34 ch.113 prior to no.437 p.239; vol.3 book 34 ch.111 no.432 p.237 for more info. Also, the early Muslim historian al-Tabari vol.2 p.72 claims Sarah gave permission for Abraham to marry Hagar.
Tazama Bukhari Hadith juzuu ya 3 kitabu cha 34 sura ya 113 kabla ya na.437 uk.239; juzuu ya 3 kitabu cha 34 sura ya 111 na.432 uk.237 kwa maelezo zaidi. Pia mwanahistoria Muislam wa zamani al-Tabari juzuu ya 2 uk.72 anadai kuwa Sara alimruhusu Abraham kumuoa Hajiri.