Lebanon's Parliament Speaker Nabih Berri is urging Arabs to support Palestinian "resistance" in Gaza to prove Israel cannot break the will of the Arab people.
Berri is allied with Hizbullah.
He spoke at the start of Thursday's conference of the Arab Parliamentarians Union in the southern Lebanese port city of Tyre.
The gathering of parliament speakers and legislators from around the Arab world is to discuss Israel's offensive on Gaza. Tyre was chosen as venue because it was bombed by Israel during the Second Lebanon War.
The union chief, Iraq's acting Parliament Speaker Khaled al-Attiyah, says Israel's attack on Gaza is a "crime against humanity."