Sayyiduna Abd al-Rahman bin Awf (may Allah be pleased with him) saw people swearing oaths between the Station of Ibrahim and the House (the Ka'bah). He asked: Is it over blood? They said: No. He asked again: Then is it over a great amount of wealth? They replied: No. He said: I fear that people will become too familiar with this place.
The Shaykh said: That is, lest people become accustomed to it and the awe of it leave their hearts.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20696