Vous avez cherché: sibi mutuo causae (Latin - Anglais)

eadem sunt, quae sibi mutuo substitui possunt, salva veritate
if the two do the same thing, is not the same

surgentes mane iuraverunt sibi mutuo dimisitque eos isaac pacifice in locum suu
and they rose up betimes in the morning, and sware one to another: and isaac sent them away, and they departed from him in peace.

e quibus quinque iunges seorsum et sex sibi mutuo copulabis ita ut sextum sagum in fronte tecti duplice
and thou shalt couple five curtains by themselves, and six curtains by themselves, and shalt double the sixth curtain in the forefront of the tabernacle.

hii vero iudaei qui in oppidis non muratis ac villis morabantur quartumdecimum diem mensis adar conviviorum et gaudii decreverunt ita ut exultent in eo et mittant sibi mutuo partes epularum et ciboru
therefore the jews of the villages, that dwelt in the unwalled towns, made the fourteenth day of the month adar a day of gladness and feasting, and a good day, and of sending portions one to another.