The verb shall derives from Old English sceal Northumbrian scule cf. Old Saxon sculan, Old Frisian skil, Its cognates in other Germanic languages include Old Norse and Swedish skola, German soll, Middle Dutch sullen, zal, Gothic skulan "to owe, be under obligation; these all represent *skol-, related via past tense form to Old English scyld "guilt," German Schuld "guilt, debt;" also Old Norse Skuld, name of one of the Norns), from PIE root *skel "to be under an obligation. All of these verbs function as auxiliaries, representing either simple futurity, or necessity or obligation.
Sanskrit word sku Ldq means 'to go by leaps, jump about, out of bound'. All the meaning show 'ahead, forward, onward' which indicate toward 'future'.