bing-xu day pillar

丙 fire gives rise to 戌 earth, and 戌 is also where fire goes to rest. 五行大義 has it plainly, 戌是火墓, 戌 is the grave of fire, and it refuses to bury earth there on the grounds that 火是其母, fire is earth's mother and mother and child are kept apart. Here Tomb and the produced element sit on one branch.

戊 reads from 丙 as Eating God, 辛 as Direct Wealth and 丁 as Rob Wealth. 三命通會 has 丙 in place of 丁 for this branch, and the day stem meeting itself would be a Friend.

屋上土 is Earth on the Roof. 三命通會 卷一 mentions no roof and writes 堆阜, a heaped mound, with 喜春夏及水, pleased by spring, summer and water.