स्वप्नो विकल्पाः
In plain words
Dream is .
The commentators
Śivasūtra with Kṣemarāja's Vimarśinī
स्वप्नो विकल्पाः ॥ ९ ॥
In plain words
Dream is thought-constructs.
On this passage
Sūtras 8, 9 and 10 are explained together; the explanation follows sūtra 10.