Clauson (1972)
An etimological dictionary of pre-thirteenth-century Turkish
p. 804
D sa:k-
prob. an Emphat. f. in -k- fr. sa:-; n.o.a.b., replaced at an early date by sakın-; see sakış. Uyğ. viii ff. Bud. [gap] yeme: inçe: sa:ksa:r ‘and if he thinks as follows’ TT VIII K.2: Xak. xi bardı: eren konuk körüp (384, 5 bulup) kutka: sakam ‘gone are the men who, when they see (find) a guest, reckon it (‘addahu) a favour from heaven’ Kaş. I 85, 5; 384, 5; n.m.e.: KB saka barsa mundağ bu yaŋlığ telim ‘if (I) had many thoughts of this kind’ 4428.