It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "Indeed, tawaf of the House of Allah is like prayer, except that you speak in it; so whoever speaks, let him speak only what is good." The chain of this hadith is sahih (authentic), but the two Shaykhs (Bukhari and Muslim) did not record it, and a group has also narrated it as mawquf (a statement of the Companion).