The Long Āgama Sūtra 16.6

16.6

爾時，善生白佛言：「我父臨命終時，遺勅我言：『汝欲禮者，當先禮東方、南方、西方、北方、上方、下方。』我奉承父教不敢違背，故澡浴訖，先叉手東面，向東方禮；南、西、北方，上、下諸方，皆悉周遍。」

Sujata then said to the Buddha, “My father’s death is imminent, and he gave me this instruction: ‘When you go to bow, you should first bow to the east, south, west, north, above, and below.’ I don’t dare not carry out my father’s instruction, so after I’ve bathed, I first salute while facing east and then bow to the east. I do this for all the directions to the south, west, north, above, and below.”