§1. References to the Man ngag lta phreng in gNubs-chen’s bSam gtan mig sgron (pp. 192, 196, 207). References to (most probably) Padmasambhava in gNubs-chen’s bSam gtan mig sgron (pp. 6, 11, 223x2), 277—quite certain).
§2. Some references to Padmasambhava by Rong-zom-pa: RZ 1: 195, 351; to Man ngag lta phreng (RZ 2: 47, 118, 195). His lTa phreng ’grel pa is perhaps the earliest of its kind.
§3. Zhabs btags ma (p. 48): Padmasambhava taught shortly before his departure!
§4. A gter ma hagiography of Padmasambhava (Chos rgyal bka’ lung, p. 288): de nas o rgyan mkhan po pad ’byung gis % rgol byed man ngag lta ba’i phreng ba gsungs % (It is as though Padmasambhava composed it for refuting the Hwa-shang opponents in the bSam-yas debate.)