Instruction: This is to be recited 1 (one) times while bowing to Lord Śiva. [Bow to the Śiva Liñga.]

करचरण कृतं वाक्कायजं कर्मजं वा।
श्रवणनयनजं वा मानसं वापराधं।
विहितंऽविहितं वा सर्वमेतत्क्षमस्व
जय जय करुणाब्धे श्रीमहादेव शम्भो॥

karacaraṇa kṛtaṁ vākkāyajaṁ karmajaṁ vā|
śravaṇanayanajaṁ vā mānasaṁ vāparādhaṁ|
vihitaṁ’vihitaṁ vā sarvametatkṣamasva
jaya jaya karuṇābdhe śrīmahādeva śambho||

Meaning: Whatever sins (faults) committed, by hand or foot, in word or deed, with ears or eyes, in mind or body, knowingly or unknowingly, may I be forgiven for all them, by the ever victorious Śrī Mahādeva (Śiva) who is Sambhu (self manifested)
~Verse 16, Shiva Aparadha Kshama Stotra by Adi Śaṅkara Bhagavatpāda