Malchut came out first, and Ze'ir Anpin after her. And so with all, and the strength of the vessel swallowed them. And the first among them returned and entered, the Keter at the beginning, and all after him. The remainder condensed and became a vessel, from the sparks that fell in it from the beating of the returning light of the Upper in the marking of the Lower. At the outset they were all only in the life of the souls. They separated one from another in their coming out, and so too in their return, every one doing what was fitting for it until the second circling. Keter remained in the mouth of Adam Kadmon and the other nine came out, until Malchut was found to be a vessel without light. All the vessels are one vessel, yet there are ten lights in it, and this is "Bound Ones".
Asarah Perakim LeRamchal 1:6
Asarah Perakim LeRamchal 1:6