It was narrated that Ibn 'Abbas (رضي الله عنه) said: When the qiblah was changed, it was said:

O Messenger of Allah, (what about) those who died and who used to pray facing Jerusalem? Then the words were revealed: "And Allah would never make your faith (prayers) to be lost (i.e. your prayers offered towards Jerusalem)” (al-Baqarah 2:143).