The haftarah for Parashat Ha’azinu, 2 Samuel 22:1–51, is David’s great hymn of thanksgiving, which also appears almost word-for-word in Psalm 18. Furthermore, the hymn parallels both the Song of the Sea in Exodus 15, read during Pesach, and Hannah’s prayer in 1 Samuel 1:1–2:10, read on Rosh Hashanah. What is so amazing about David’s song that it would be made into a psalm and be included three times in the liturgical calendar? To answer this question, let’s look at two terms in the hymn—tzur (rock) and tamim (blameless, innocent, perfect).