What is the ruling on two girls sleeping side-by-side, or sharing one blanket while touching, or sharing one blanket without touching? And does the ruling against them sleeping side-by-side apply to a period of rest?

It is forbidden for two women to lie naked in one bed, according to Muslim's narration: "A woman should not enter with another woman in one garment." However, if they are not naked, there is no harm in them lying in one bed, even if they are touching, as long as there is no fear of temptation between them. This is what Al-Shirbini and Al-Bujairimi in his commentary, and the author of Kashshaf Al-Qina' have adopted.