18-2 (The compiler of the book narrated) that his father - may God be pleased with him - narrated that Sa’ed ibn Abdullah quoted Ahmad ibn Aba Abdullah al-Barqy who linked it up through a chain of narrators to Aba Abdullah as-Sadiq (MGB) who said,

“What is meant by ‘long enough life’ in the following words of the Honorable the Exalted God, ‘Did We not give you long enough life so that he that would should receive admonition?’ is eighteen years.”