Taking Stormlight back

Kaladin smiled, then reached down, touching the Stormlight infused into the stone beneath Rock. He hadn’t ever tried to take it back after using it in this way. Could he? He closed his eyes and breathed in, trying . . . yes.

Some of the tempest within him stoked again. When he opened his eyes, Rock was free. Kaladin hadn’t been able to take it all back, but some. The rest was evaporating into the air.

Words of Radiance Chapter 12