'Say' shares PIE *sekw- (to utter) with Norse 'saga' — which literally means 'a thing said.'
To utter words so as to convey information, an opinion, instruction, or a feeling.
From Proto-Indo-European *sekw- ("to tell, to point out") or *sey- ("to say"), through Proto-Germanic *sagjanam ("to say, speak") and Old English secgan ("to say, narrate, tell"). The Proto-Germanic *sagjanam is the ancestor of the entire Germanic family: Old Saxon seggian, Old High German sagen (German sagen), Old Norse segja, Gothic sagjan. The PIE root *sekw- also yielded Latin sequi ("to follow") and its derivatives — the connection being between "pointing out" (speaking) and "following" a