AITAREYA UPANISHAD · 1.3.12

स एतमेव सीमानं विदार्यैतया द्वारा प्रापद्यत । सैषा विदृतिर्नाम द्वास्तदेतन्नान्दनम् । तस्य त्रय आवसथास्त्रयः स्वप्ना अयमावसथोऽयमावसथोऽयमावसथ इति ॥ १२ ॥

sa etameva sīmānaṃ vidāryaitayā dvārā prāpadyata । saiṣā vidṛtirnāma dvāstadetannāndanam । tasya traya āvasathāstrayaḥ svapnā ayamāvasatho’yamāvasatho’yamāvasatha iti ॥ 12 ॥

It was this bound that He cleft, it was by this door that He entered in. ’Tis this that is called the gate of the cleaving; this is the door of His coming and here is the place of His delight. He hath three mansions in His city, three dreams wherein He dwelleth, and of each in turn He saith, “Lo, this is my habitation” and “This is my habitation” and “This is my habitation.”

Sri Aurobindo · CWSA 18, pp. 201, 202