'Sparrows' in the Bible

Are not two sparrows sold for a penny? And one of them will not fall to the ground {without the knowledge and consent} of your Father.

Therefore do not be afraid; you are worth more than many sparrows.

Are not five sparrows sold for two pennies? And not one of them is forgotten in the sight of God.

But even the hairs of your head are all numbered! Do not be afraid; you are worth more than many sparrows.