According to the scriptures. In fact, one can always practice contemplation whenever propagating the Dharma or engaging in any other virtuous activity. Contemplation, in the context of teaching the Dharma, means to conduct the teaching assiduously and without distraction. That in the context of liberating living beings means to recite the sutras or mantras with total concentration and release the beings with great care. If the mind wanders while doing the recitation, it is no longer practicing contemplation. Contemplation denotes a still mind. To offer dedicated prayers to the Buddha or steadfastly generate true compassion toward the beings when liberating them signifies the perfection of contemplation.

- Quote from The Right View, "Liberating Living Beings"