Valmiki Ramayana Ayodhya Kanda Sarga 65 Shloka 19

अन्तःपुरम् women in the inner apartment, तथा in that way, सुप्ते asleep, शुभे auspicious, ते देव्यौ the two queens, तम् that, नृपम् king, दृष्ट्वा having seen, सुप्तमेव as if asleep, उद्गत प्राणम् with lifebreath moving upward and leaving him dead, अमन्यत considered.

Having seen the two auspicious queens asleep, the women in the inner apartment thought the king died in his sleep.