Psalm 40: Lord, come to my aid/Here am I, Lord
Ps40LordComeToMyAid16, Ps40LordComeToMyAid13: Responsorial psalm settings for 20th Sunday of Ordinary Time (C); the 2016 version uses the current Lectionary text and shifted versification. See 8-18-13 Liturgical Dress post for when a "Lord, come to my aid" in this "family" was first sung.
Recording (thanks, Silvia!)
Ps40HereAmILord: Responsorial psalm setting for 2nd Sunday of Ordinary Time (A). Don't get too precise about the note values in the verses. Demo