Where will legal proceedings be heard for the return of a child who has allegedly been abducted to Israel from another Hague Convention country?

In Israel, in the appropriate Family Court.
 

Hague Convention Countries

The “Hague” countries that are bound by the Convention in relation to abductions to and from Israel are:

Andorra | Argentina | Australia | Austria | The Bahamas | Belarus | Belgium | Belize | Bosnia and Herzegovina | Brazil | Burkina Faso | Canada | Cayman Islands | Chile | China | (Hong Kong & Macau) | Colombia | Croatia | Cyprus | Czech Republic | Denmark | Ecuador | Estonia | Falkland Islands | Fiji | Finland | France | Gabon | Georgia | Germany | Greece | Honduras | Hungary | Iceland | Ireland | Israel | Italy | Japan | Latvia | Lithuania | Luxembourg | Macedonia | Malta | Mauritius | Mexico | Monaco | Moldova | Morocco | Netherlands | New Zealand | Nicaragua | Norway | Panama | Paraguay | Peru | Poland | Portugal | Romania | Russia | St Kitts and Nevis | Serbia and Montenegro  | Singapore | Slovakia | Slovenia | South Africa | Spain | Sweden | Switzerland | Turkey | Turkmenistan | United Kingdom | United States of America | Ukraine | Uruguay | Uzbekistan | Venezuela | Zimbabwe

New countries may join the Convention in the future so that it applies to abductions between them and Israel, if Israel accepts their accession.