What is the ruling of the Sharia on the intermingling of souls and their meeting within the body? Is it permissible or forbidden?

This question is truly astounding. It would have been more appropriate for the questioner to inquire about the possibility of this occurring before it was deemed a ruling. What the questioner has mentioned is nothing but a kind of superstition, for it is not indicated by religious law, nor accepted by reason, nor corroborated by custom or experience. What is known as the "marriage of souls" and "spiritual lineage" has only been found in the misguided discourse of innovators.