Chief Justice Maria Lourdes Sereno refused to engage in a word war with President Rodrigo Duterte, opting instead to keep mum after the latter told her not to interfere in the government's campaign against the drug menace.
"Many things have been said. The Chief Justice sees no need to add to what are being said," Supreme Court spokesman Ted Te told reporters.
President Duterte earlier warned Sereno to let him pursue a deadly anti-crime campaign that has left hundreds of suspects dead, suggesting otherwise he would impose "martial law."
Duterte to Sereno: Would you rather I declare martial law?
This is after Sereno criticized Duterte's public shaming of seven lower court judges for alleged involvement in the narcotics trade, adding that one of the judges was murdered eight years ago.
Duterte names politicians, cops, judges in drug trade
"Go ahead and try to stop me. Would you rather that I declared martial law?" Duterte said in a speech to soldiers during a visit to a military camp in the southern Philippines.
"Let's not kid each other ma'am, and do not force the issue," Duterte warned Sereno.
"You do not warn me. I warn you. I can order everyone in the executive department not to honor you," he added.
"Please do not create a confrontation, a constitutional war. We will all lose," the president added.
Sereno had told Duterte in a letter that it was her sole responsibility to impose punishment on judicial "misfits", and that publicly naming them, even without charges filed against them, had put their lives in danger.
"To safeguard the role of the judges as the protector of constitutional rights, I would caution them very strongly against 'surrendering' or making themselves physically accountable to any police officer in the absence of any... warrant of arrest," she added.
Sereno cautions 'narco-judges' vs surrender without warrant
Duterte, elected in a landslide in May largely on a pledge to kill tens of thousands of criminals, has previously shrugged off allegations that police were committing extrajudicial killings.
However, police have acknowledged in a new tally released Tuesday killing 513 drug suspects, allegedly for resisting arrest.
Human rights groups have criticized the killings by police as hundreds of other people have been slain by shadowy anti-crime vigilantes who often leave signs on their victims' bodies accusing them of drug trafficking.
Police have also arrested more than 7,000 drug suspects since Duterte took office.
United Nations agencies and international human rights monitors have expressed concern over the killings, and on Monday the US government, the Philippines' main military ally, weighed in on the issue.
"We are concerned by these detentions, as well as the extra judicial killing of individuals suspected to be involved in drug activity in the Philippines," State Department spokeswoman Elizabeth Trudeau said in Washington. With Agence France-Presse