Chapter 3 · The Yoga of Action · Krishna said
Bhagavad Gita 3.21 — Leading by example
यद्यदाचरति श्रेष्ठस्तत्तदेवेतरो जनः। स यत्प्रमाणं कुरुते लोकस्तदनुवर्तते ॥
yadyadācarati śreṣṭhastattadevetaro janaḥ | sa yatpramāṇaṃ kurute lokastadanuvartate ||
Meaning
Whatever a great person does, others follow. Whatever standard they set, the world goes by it.
In today's life
Younger siblings, students and teammates copy what you do more than what you say — set a good example.