It goes, "Fall down seven times, stand up eight." Basically, it means don't give up.

跌到七次，第八次就可以站起来，意思是不轻易放弃。

youdao

Rostov excused himself, left the stake of eight hundred and laid down the seven of hearts, a card with a corner torn, which he had picked up from the ground.

罗斯托夫听从他的话，不更改写下的八百卢布，押在那张他从地上拾起来的破了角的红桃七点上。

youdao

Rostov excused himself, left the stake of eight hundred and laid down the seven of hearts, a card with a corner torn, which he had picked up from the ground.

罗斯托夫听从他的话，不更改写下的八百卢布，押在那张他从地上拾起来的破了角的红桃七点上。

youdao