Vasudeva had been imprisoned by Kamsa, and therefore, although present in Mathura, he was unable to see Nanda Maharaja for many years. Therefore when they met again, Vasudeva considered this meeting to be another birth

Expressions researched:
"Vasudeva had been imprisoned by Kaṁsa, and therefore, although present in Mathurā, he was unable to see Nanda Mahārāja for many years. Therefore when they met again, Vasudeva considered this meeting to be another birth"

Srimad-Bhagavatam

SB Canto 10.1 to 10.13

Vasudeva had been imprisoned by Kaṁsa, and therefore, although present in Mathurā, he was unable to see Nanda Mahārāja for many years. Therefore when they met again, Vasudeva considered this meeting to be another birth.

SB 10.5.24, Translation and Purport

It is also by good fortune that I am seeing you. Having obtained this opportunity, I feel as if I have taken birth again. Even though one is present in this world, to meet with intimate friends and dear relatives in this material world is extremely difficult.

Vasudeva had been imprisoned by Kaṁsa, and therefore, although present in Mathurā, he was unable to see Nanda Mahārāja for many years. Therefore when they met again, Vasudeva considered this meeting to be another birth.