On one occasion the Venerable Sariputta was dwelling among the Vajjians at Ukkacela. Then the wanderer Samandaka approached the Venerable Sariputta and exchanged greetings with him. When they had concluded their greetings and cordial talk, he sat down to one side and said to the Venerable Sariputta: "Friend Sariputta, it is said, 'Nibbana, Nibbana.' What now is Nibbana?" ...
(The remainder of this samyutta is identical with the preceding one except for the identity of the interlocutor.)
"But, friend, if a bhikkhu is practicing in accordance with the Dhamma, would it take him long to become an arahant?" "Not long, friend."
References 1. www.accesstoinsight.org 2. https://suttacentral.net/ 3. The connected discourses of the Buddha (Bhikkhu Bodhi)