▁reve al ▁God ' s ▁Self ▁to ▁Abraham , ▁who ▁circum c ised ▁himself ▁for ▁God ' s ▁sake . ▁And ▁thus , ▁" the ▁Lord ▁appear ▁to ▁him ." ▁ ▁Bar ▁K app ara ▁taught ▁that ▁every ▁dream ▁has ▁its ▁interpretation . ▁Thus ▁Bar ▁K app ara ▁taught ▁that ▁the ▁" lad der " ▁in ▁Jacob ' s ▁dream ▁of ▁ ▁symbol izes ▁the ▁st air way ▁leading ▁up ▁to ▁the ▁alt ar ▁in ▁the ▁Temple ▁in ▁Jerusalem . ▁" Set ▁upon ▁the ▁earth " ▁implies ▁the ▁alt ar , ▁as ▁ ▁( 2 0 : 2 1 ▁in ▁the ▁N J PS ) ▁says , ▁" An ▁alt ar ▁of ▁earth ▁you ▁shall ▁make ▁for ▁Me ." ▁" And ▁the ▁top ▁of ▁it ▁reached ▁to ▁heaven " ▁implies ▁the ▁sacrific es , ▁the ▁od or ▁of ▁which ▁asc ended ▁to ▁heaven . ▁" The ▁ang els ▁of ▁God " ▁symbol ize ▁the ▁High ▁Pri ests . ▁" A sc ending ▁and ▁desc ending ▁on ▁it " ▁describes ▁the ▁pri ests ▁asc ending ▁and ▁desc ending ▁the ▁st air way ▁of ▁the ▁alt ar . ▁And ▁the ▁words ▁" and , ▁beh old , ▁the ▁Lord ▁stood ▁beside ▁him " ▁in ▁ ▁once ▁again ▁invoke ▁the ▁alt ar , ▁as ▁in ▁ ▁the ▁proph et ▁reports , ▁" I ▁saw ▁the ▁Lord ▁standing ▁beside ▁the ▁alt ar ." ▁ ▁In ▁medieval ▁Jewish ▁interpretation ▁The ▁par ash ah ▁is ▁discussed ▁in ▁these ▁medieval ▁Jewish ▁sources : ▁ ▁Ex od us ▁chapter ▁ 1