The Holy Bible says,

One who has no sense shakes hands in pledge
and puts up security for a neighbor.

(Proverbs 17:18).

Whoever puts up security for a stranger will surely suffer,
but whoever refuses to shake hands in pledge is safe.

(Proverbs 11:15).

Do NOT be one who shakes hands in pledge
or puts up security for debts;
if you lack the means to pay,
your very bed will be snatched from under you.

(Proverbs 22:26-27).