Mark 6:20
From Textus Receptus
Mark 6:20 For Herod feared John, knowing that he was a just man and an holy, and observed him; and when he heard him, he did many things, and heard him gladly.
Observe
observe late 14c., "to hold to" (a manner of life or course of conduct), from O.Fr. observer, from L. observare "watch over, look to, attend to, guard," from ob "over" (see ob-) + servare "to watch, keep safe," from PIE base *ser- "to protect." Meaning "to attend to in practice, to keep, follow" is attested from late 14c. Sense of "watch, perceive, notice" is 1560s, via notion of "see and note omens." Meaning "to say by way of remark" is from c.1600.