Sayyiduna Ibn Abbas (may Allah be pleased with him) used to cling to the place between the Corner and the Door, and he used to say: Whoever clings to the place between the Corner and the Door, which is called the Multazam, and asks Allah for anything, Allah will surely give it to him.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9766