Parallel
Psalms 39:9
Rahlfs Septuagint (1935) · Berean Standard Bible
τοῦ ποιῆσαι τὸ θέλημά σου ὁ θεός μου ἐβουλήθην καὶ τὸν νόμον σου ἐν μέσῳ τῆς κοιλίας μου
40:8
I delight to do Your will, O my God (note: Cited in Hebrews 10:5–7); Your law is within my heart.”