One day's slice of the 30-day Psalms cycle, as a two-element tuple
[begin, end]. Both entries are normally chapter numbers (e.g.
[10, 17]), but Psalm 119 — the longest chapter, studied over two
days — uses verse-prefixed strings ("119:1"/"119:96" and
"119:97"/"119:176").
One day's slice of the 30-day Psalms cycle, as a two-element tuple
[begin, end]. Both entries are normally chapter numbers (e.g.[10, 17]), but Psalm 119 — the longest chapter, studied over two days — uses verse-prefixed strings ("119:1"/"119:96"and"119:97"/"119:176").