Which scripture has the following shloka?
साधूनां दर्शनं पुण्यं स्पर्शनं पापनाशनम् ।
संभाषणं कोटितीर्थं वन्दनं मोक्षदायकम् ॥sādhūnāṃ darśanaṃ puṇyaṃ sparśanaṃ pāpanāśanam ।
saṃbhāṣaṇaṃ koṭitīrthaṃ vandanaṃ mokṣadāyakam ॥
It is chapter 12 verse 7 of Chanakya's Niti Shastra. Here it is in Sanskrit and here it is in English
sādhūnāṃ darśanaṃ puṇyaṃ sparśanaṃ pāpanāśanam ।
saṃbhāṣaṇaṃ koṭitīrthaṃ vandanaṃ mokṣadāyakam ॥One indeed becomes blessed by having darshan of a devotee; for the devotee has the ability to purify immediately, whereas the sacred tirtha gives purity only after prolonged contact.
Meaning of Sanskrit words :
Seeing sadhus is punya. Touching them destroys sins. Talking to them is equivalent to a crore pilgrimages (holy rivers). Prostrating them paves way to Moksha.