The president said this in a series of tweets on Sunday to commemorate the fifth year since the girls were abducted from Chibok, Borno state.
Boko Haram abducted 276 girls from Chibok in April 2014. Only 107 of them are back and reunited with their families.
The president said he is pleased to see the progress being made by the girls rescued from the insurgents.
He also noted that the security agencies “have successfully rescued thousands of captives, and they will not relent until every captive is free.”
“Today marks five years since the abduction of our Chibok daughters. We have succeeded in bringing back 107 of them, but we will not rest until all the remaining girls are back and reunited with their families. I made this promise when I became President, and I will keep it,” Buhari tweeted.
“We will never give up on our missing daughters, including Leah Sharibu; and all the other people held hostage by Boko Haram. In the last four years, our security agencies have successfully rescued thousands of captives, and they will not relent until every captive is free.
“It gladdens our hearts to see the progress being made by the young women rescued from Boko Haram. We celebrate their courage & determination to defy the evil ideology of the terrorists, by continuing to pursue their education. There is no doubt that the world is inspired by them.
“I extend our best wishes to all the Chibok girls in various schools in Nigeria and around the world. Special congratulations to Kauna Yaga Bitrus, who has excelled in her college in Maine, USA, and will very soon be receiving an ‘Against All Odds Award’ from her school.”