YHWH, he is God; there is no other. So too Deut 4:35, 39; 7:9.
Because the affirmation “there is no other (beside him)” is so frequent in the
polemics of Second Isaiah (Isa 45:5, 6, 14, 18, 21, 22; 46:9), Weinfeld sees
this as evidence for late (i.e., exilic) origin (1972, 212). But the use of
this phrase in the spontaneous outcry of the people at Mt. Carmel (cf. 1 Kgs 18:39)
suggests that it may have been a traditional creedal exclamation. (Mordechai
Cogan, I Kings: A New Translation with Introduction and Commentary [AYB
10; New Haven: Yale University Press, 2008], 288)