הִקְשִׁ֣יחַ בָּנֶ֣יהָ לְּלֹא־לָ֑הּ לְרִ֖יק יְגִיעָ֣הּ בְּלִי־פָֽחַד׃
She is hardened against her young ones, as if they were not hers; Though her labour be in vain, she is without fear; .
Read kabbalistic (mystical) interpretation of Job 39:16: and classical mystical sources.