we will sing my songs: i.e. the "Songs of the Degrees" (App-67). Where are "my songs", and what were they if not the fifteen songs named after the ten degrees by which the shadow of the sun went back on the sundial of Ahaz (verses: Isa_38:7, Isa_38:8)?
the house of the LORD. Note Hezekiah's love for this in these songs (Psa_122:1Psa_122:9; Psa_134:1, Psa_134:2). See App-67.