'Perhaps' in the Bible

So Sarai said to Abram, “Now behold, the Lord has prevented me from bearing children. Please go in to my maid; perhaps I will obtain children through her.” And Abram listened to the voice of Sarai.

Perhaps my father will feel me, then I will be as a deceiver in his sight, and I will bring upon myself a curse and not a blessing.”

and you shall say, ‘Behold, your servant Jacob also is behind us.’” For he said, “I will appease him with the present that goes before me. Then afterward I will see his face; perhaps he will accept me.”

Take double the money in your hand, and take back in your hand the money that was returned in the mouth of your sacks; perhaps it was a mistake.