How to understand what the lying old gentleman said?

The old man said, "I have recited the scriptures a thousand times and I am in Ziyun." The Taoist priest believed this sentence and read it until 999, so he bathed the altar, said goodbye to relatives and friends, and waited for Yun Qi. Say it again, there are thousands of people, and there are no clouds at dusk. The Taoist priest pointed to the statue of the old man and sighed, "Who knew you could lie at such an age?"

This is a joke. It is said that after chanting the scriptures for 1000 times, you can get the Tao to heaven.