Post here suttas related to Arahants teaching to others out of compassion.
For me the first disciples goal was taking Buddha recommendation that whoever did not cross over personally first can’t help others cross over. So they help themselves first. (Edit: my understanding currently is that what Buddha meant is alteast stream-entry, to really help others cross on the spot)
Buddha said about how can someone that didn’t crossover help others crossover? So the wish to get Nirvana to reach goal in this life out of compassion to teach others as done by the Buddha was first disciples goal.