What is the relationship 驩 required by the 大略 between husband and wife?
水巷孑蠻 wrote:

there's a remark &quot;不得謂不得聖人之禮法&quot; and &quot;驩與歡同&quot; after the verse &quot;老者以養&quot;

Edit:
聖人之禮法 saint's etiquette
君臣不得不尊，without it, retainer  would not respect the ruler
父子不得不親，without it, father and son would not love each other
兄弟不得不順，without it, brothers would not be agreeable to each other
夫婦不得不驩(歡)，without it, husband and wife would not please each other
In saint's etiquette, both 父 and 子 need to love each other; both older and younger brother need to be agreeable to each other. And it is as much a husband's responsibility to please his wife as a wife's responsibility to please her husband. As for 君臣, it is possible that the demand to respect is on the retainers only.
My original post before knowing there's a remark:

君臣不得不尊，ruler and retainer must respect each other
父子不得不親，father and son must love each other
兄弟不得不順，brothers must be agreeable to each other
夫婦不得不驩(歡)，husband and wife must please each other
少者以長，grow the young
老者以養。take care of the old
故天地生之，that's how the world is formed
聖人成之。saint is created
荀子's words mentioned 'mutually respect, love, follow and please' ; but in practice, a retainer is expected to respect his ruler, a son is expected to love his father, a younger brother is expected to follow his older brother and a wife is expected to please her husband. The expectation on the other end is more often, treated like a suggestion.