Because it is contained in Scripture, "Behold, I lay in Zion a chief cornerstone, chosen, and precious: He who believes in him will not be disappointed."
 *In fact but one uncial (Cod. Angelicus Romanus) of the ninth century with many cursives warrants the omission; but , A, B, C, K, more than fifty cursives, and all the versions but the Arabic of the Parisian Polyglott support the words. The early quotations, Greek and Latin, save of Oecumenius, point to the same reading.
