諸經要集 4.105

4.105

The Sanqian weiyi also states: Burning incense before the Buddha involves three things: first, replace the old incense inside; second, take out the incense oneself; third, distribute it to others. Preparing the censer involves three things: first, pour out the old ashes first, gather the unburnt incense inside, and set it to one side; second, wipe it clean before adding fire, then take back the old incense and place it inside; third, when the fire is lit and blazes, one must not blow on it and extinguish the embers.