Well, there are several hymns in Vedas which can mention rebirth. However it depends upon interpretation.
I've found couple of verses from Rigveda Mandala 1 of which interpretation mention rebirth according to Swami Dayananda Sarasvati, the founder of Arya Samaj. Though Ralph Griffith or Gayatri Pariwar's translation doesn't mention rebirth.
Quoting Rigveda Bhashya of Swami Dayananda Saraswati:
In this Mantra, the doctrine of Re-birth is enunciated. Whatever kind of actions performed by men, they got the same kind of birth and enjoyment in the next
Rigveda Mandala 1, Sukta 24, Mantra 2:
O men, we certainly believe in om eternal, Immortal God who is dispense of fruit of good or bad actions done by us and according to Whose laws we get rebirth. You must also know that one God to be giver of rebirth, non else can do this work. It is he who gives birth to emancipated persons also through parents at the end of MahaKalpa.