John Gill

But thou hast not called upon me, O Jacob,.... The Jews, though they were the posterity of Jacob, a praying person, yet did not tread in his steps, but were more like the Heathens that called not on the name of the Lord; though there is no necessity of restraining this to prayer, it may regard the whole worship of God, which is sometimes included in the invocation of his name; and so the Targum, "and ye come not to my worship, O ye of the house of Jacob.'' The Jews, in Christ's time, did not call upon his name, nor believe in him, nor receive his Gospel, nor submit to him and his ordinances; they rejected him and his service, therefore the Lord rejected them, and called the Gentiles, as before prophesied of: but thou hast been weary of me, O Israel: of the word, worship, and ordinances of God; see Mal 1:13.