It is narrated from a Companion (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: "Tawaf is like prayer, so when you perform Tawaf, speak less."
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 23201
Hadith Gradingحکم دارالسلام:حديث صحيح، ولا يضر توقف محمد بن بكر عن رفعه