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."
Kungoko ikhoyo nokubakho esibhalweni indawo ethi, Yabona, ndibeka eZiyon ilitye lembombo, elinyuliweyo, elinqabileyo; Lowo ukholwayo kuye akayi kukha adaniswe.