After a time that is sixty times longer than what has been stated as the period of Shudra birth, one becomes a Kshatriya. In the Kshatriya order one has to pass a very long time. After a time that is measured by multiplying the period last referred to by sixty, one is born as a fallen Brahmana. In this order one has to wander for a long period.
ततः षष्टिगुणे काले राजन्यो नाम जायते। ततः षष्टिगुणे काले लभते ब्रह्मबन्धुताम्॥ ब्रह्मबन्धुश्चिरं कालं ततस्तु परिवर्तते।