Following are couple of shLOka from the mahAbhArathA, taken from Chathurvedi Badrinath’s “The Mahabharata – An inquiry in the human context”

अद्रोहः सर्वभूतेषु कर्मणा मनसा गिरा।
अनुगृहश्र्च दानं च शीलमेतत् प्रशस्यते।। शान्ति पर्व 124.66

adrOhaḥ sarvabhUtEṣu karmaṇA manasA girA |
anugrahashca dAnaṃ ca shIlamEtat prashasyatE || shAnti parva 124.66

Freedom from malice towards any being, in act, thought, and speech; benevolence towards all; caring for and sharing with others with grace – this is shILa.

धर्मः सत्यं तथा वृत्तं बलं चैव तथाप्यहम्।
शीलमूला महाप्राज्ञ सदा नास्त्यत्र संशयः।। शान्ति पर्व 124.62

dharmaḥ satyam tathA vrttam balam caiva tathApyaham |
sīlamUlA mahAprAgna sadA nAstyatra saṁshayaḥ || shAnti parva 124.62

dharma, truth, good conduct, strength and I (srI – all that which is desirable in human life) – all of us are rooted in shILa. Of that, there is no doubt.
{this slokA is through the voice of srI, and thus is the use of ‘I’ and ‘us’}

The first slokA defines shILa, which is said as foundational even to dharma (धर्म), which I am able to relate to quite much.

शीलं प्रदानं पुरुष तद् यस्येह प्रणश्यति।
न तस्य जीवितेनार्थो न धनेन न बन्धुभिः।। उध्योग पर्व 35.58

shIlaṃ pradhAnaṃ puruSha tad yasyEha praṇashyati |
na tasya jIvitEnArthO na dhanEna na bandhubhiḥ || udhyOga parva 35.58

In human beings, it is shILa that has the chief place. If that is lost, a person’s life, wealth, and friends, all are meaningless