قَالَ هَـٰٓؤُلَآءِ بَنَاتِىٓ إِن كُنتُمْ فَـٰعِلِينَ

Qala haola-i banateein kuntum faAAileen

[Lot] said, "These are my daughters - if you would be doers [of lawful marriage]."