Tantrasara (Krishnananda) 2.p29

2.p29

ṣaḍaṅganyāsamācarya vāmahaste jalaṃ tataḥ .
gṛhītvā dakṣiṇenaiva sampuṭaṃ kārayedbudhaḥ .
śiva - vāyu - jala - pṛthvīvahnibījaistridhā punaḥ .
abhimantrya ca mūlena saptadhā tattvamudrayā .
nikṣipya tajjalaṃ mūrdhni śeṣaṃ dakṣe nidhāya ca .
śarīrāntaḥsthitaṃ pāpaṃ kṣālayetsādhakāgraṇīḥ .. 8 .. tatohastaṃ
prākṣālyācamya hrīṃ haṃ saḥ oṃ ghṛṇi sūrya āditya iti mantreṇa
vā sūryāyārghyaṃ dadyāt ..

Having performed the placement on the six limbs, then taking water in his left hand, / the wise man should form a cavity over it with his right hand. / Having consecrated it three times with the seed-syllables of Śiva, wind, water, earth, and fire, / and having cast that water seven times on his head with the root-mantra using the tattvamudrā, / and placing the remainder in his right [hand], / the foremost practitioner should wash away the sin situated within his body. (8)
Then, having washed his hands and sipped water, he should offer water to the Sun with the mantra: 'hrīṃ haṃsaḥ oṃ ghṛṇiḥ sūryaḥ ādityaḥ' or [another].