I covenanted with you: or, supply the Ellipsis thus: "[I remember", or "Remember ye] the word which I", &c. Reference to Pentateuch (Exo_29:45, Exo_29:46).
when ye came, &c. Reference to Pentateuch (Exo_12:51). App-92.
so My Spirit, &c.: i.e. speaking by the prophets. Compare Neh_9:20. Isa_63:10-14.