大方廣佛華嚴經願行觀門骨目 2.16

2.16

At that time, the Bodhisattva Mind King addressed all the bodhisattvas: "One kalpa in Sahā is one day and one night in Sukhāvatī. With Kaṣāyadhvaja and so forth, there are another nine levels; thus kalpas make one day and one night." Finally it says: "…up to passing beyond one million asaṃkhyeya realms, one kalpa in the final world is one day and one night in the Bhadravijaya buddha-land of the realm Padmavijayā. Great bodhisattvas of the same practice, such as Samantabhadra, fill it entirely (this speaks throughout of buddha-lands; at the end it says that they have already attained buddhahood)."