A man that is destitute must exert himself.

An auld dog bites sicker.

An auld horse may dee ere the grass grow.

"While the grass is growing the steed is starving."—German.

An auld knave's nae bairn.

"An old fox needs learn no new tricks."—English.

An auld man's a bedfu' o' banes.

An auld mason maks a gude barrowman.

An auld pock is aye skailing.

An auld pock needs muckle clouting.