What is the reason for the delayed marriage of five university-educated, religious, and beautiful sisters from a respectable family, while their sixth sister is married?

One should be content with Allah's decree and destiny, and strive with the means that facilitate marriage, among them: sitting with righteous women and presenting the issue to them so they can help in finding husbands, and for the girl to present herself to someone whose religiosity and character she knows and whom she believes would accept her. Finally, frequent supplication and seeking refuge in Allah to ease the situation.