Peter's Pentecost logic: David's tomb is occupied — so David spoke of Another.
Read the verse in full at Blue Letter Bible (ESV).
The first taste — one dip, the whole day.
The apostles preached the resurrection almost entirely from the Psalms. Psalm 16: 'you will not abandon my soul to Sheol, or let your holy one see corruption' — Peter's Pentecost text. Psalm 40: 'Behold, I have come to do your will' — the willing incarnation. Psalm 68: ascended on high, leading captives, giving gifts. Psalm 78: he will open his mouth in parables. Psalm 102: the unchanging Creator — read by Hebrews as the Son. Psalm 109: even the betrayer's vacant office was in the hymnal.
Promise and fulfillment — every claim linked for verification.
Peter's argument (Acts 2:25–32) is disarmingly simple: David wrote it, David decayed, David's tomb 'is with us to this day' — therefore David prophesied of the one whose body never saw decay.
'The pit; corruption, decay' — Psalm 16:10's word. The Septuagint rendered it diaphthora, 'decay,' and Peter's whole Pentecost case rests on the rendering: the Holy One's flesh did not decompose. Between death and the third day, decay had no jurisdiction.
Deepest water — where the passage meets your week.
Psalm 16 begins in contentment — 'the lines have fallen for me in pleasant places' — and ends in resurrection. The order is not accidental: a heart that has learned 'you are my Lord; I have no good apart from you' (v. 2) is the heart that can face the grave with 'therefore my heart is glad.' Resurrection hope is not first an argument; it is the final stanza of a life whose portion is God himself.