Changing bodies in Braj

Jayatarāma composed the Jogapradīpyakā in 1737 CE (Saṃvat 1794, Āśvina śukla 10) while the earliest dated manuscript dates from Saṃvat 1766. It is a compendium of haṭhayoga practices, which is not uncommon for his time. But this is written in the vernacular (a Braj-like old-ish Hindi dialect to be more precise). A further unusual feature (at least for me) is that it contains a short passage on changing bodies (parakāyapraveśa), the older Hindu cousin of grong 'jug. Here is what he says:

।। अथ परकाया प्रवेसन ।।

परपकजोग जबै सधि अावै, जोगी सिधि अागम की पावै ।

अपनी इच्छा विचरै जोई, करै भगंगम की क्रिया सोई ।। ७९२ ।।

सकल पवन अपने वसि अाई, नारी गोप्य रही कोई ।

मन की वृति न छानी कोई, जा जा समै चलत है सोई ।। ७९३ ।।

सकल सरीर दिव्यता पाय, अावर्ण सब ही गयो पलाय ।

वायुरूप जीव कौ जानौ, जहां वाय तहां करै पयानौ ।। ७९४ ।।

ताते जोगी यह मत पावै, परकाया प्रवेस करावै ।

जो कोई मृतक तन को देषै, अरू पुनि अपनी इच्छा पेषै ।। ७९५ ।।

करै प्रवेश तास में जाई, गुरु की क्रिपा जुक्ति सो पाई ।

सकल पवन मन सहित चलावै, अपने कंठि अनि ठहरावै ।। ७९६ ।।

बहुरौ मंन्त्र पढै ता वारा, जाकौ गुरु ते लहयौ विचारा ।

काक चंचवत मुष करि लेवै, अपने प्राण मृतक मुष देवै ।। ७९७ ।।

मरै अाप मृतक उठि धावै,पूर्व देह की समृत्य पावै ।

बहुरि जु अपना मन मैं चहै, यह तन छाडि वहै तन गहै ।। ७९८ ।।

।। दोहा ।।

परकाया परवेस नो, गुरुमुष पावै धीर ।

जयतराम जीर्ण तजै, जों तन गहे सरीर ।। ७९९ ।।

।। इति परकाया परवेसन ।।

Since I am not a specialist in mediaeval Hindi, I cannot pretend that I understand more than the average Sanskritist. The general outline of the procedure seems clear (manipulating breath, introducing it into the corpse's body through the mouth). I especially enjoyed 798ab: "You yourself will die, and the dead will arise running, [but] you will retain the memory of your old body."

Source: Jogapradīpyakā of Jayatarāma, critically edited by Swāmī Maheśānanda & Dr. B. R. Sharma, Shri G. S. Sahay, Shri R. K. Bodhe, Kaivalyadhama S.M.Y.M. Samiti, Lonavla 2006.

With thanks to Jason Birch for bringing this edition to my attention.