'Pondering' in the Bible

But she was very perplexed at this statement, and kept pondering what kind of salutation this was.

and Mary was preserving all these things, pondering in her heart;

And [while] the people were waiting expectantly and all were pondering in their hearts concerning John, whether perhaps he might be the Christ,

But as Peter continued pondering over the vision, the Spirit said to him, Behold, three men seek thee;