Theophylact of Ohrid — on Acts 3:11 (Commentary on Acts)

“By his own disposition and by his enthusiastic love for the apostles Peter and John, and perhaps also out of a feeling of gratitude toward them or from a desire to bring them greater pleasure, he did not leave their side. As for the fact that this miracle was performed in the temple, this was for greater benefit and salutariness. He was afraid to fall behind them, as he thought that he would be free from his ailment only as long as he held on to and touched them. He thought this especially because Peter had healed him by taking him by the hand and lifting him up. And this happened in the portico because this portico alone remained from the temple of Solomon, since Nebuchadnezzar had destroyed the building and Cyrus the Persian had rebuilt it.”