Usually in the form of "take refuge in the Three Jewels". Buddhists "take refuge" in, or to "go for refuge" to, the Three Jewels or Triple Gem, (aka the "Three Refuges"). This can be done formally in lay and monastic ordination ceremonies.
The Three Jewels general signification is:
- the Buddha;
- the Dharma, the teachings;
- the Sangha, the community of (at least partially) enlightened beings, often approximated to community of monks and nuns (Bhikkhus and Bhikkhunis).
Refuge in the Triple Gem is common to all major schools of Buddhism.
Example via www.ramdass.org: Featured Teacher: Kalu Rinpoche