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We report extremely faint 144 MHz radio emission from two gravitationallylensed quasars, SDSS J1004+4112 (z = 1.730) and SDSS J2222+2745 (z = 2.803),using the LOFAR Two Metre Sky Survey (LoTSS) data release 2. After correctingfor the lensing magnifications, the two objects have intrinsic flux-densitiesof 13+/-2 and 58+/-6 uJy, respectively, corresponding to 144 MHz rest-frameluminosities of 10^(23.2+/-0.2) and 10^(24.42+/-0.05) W / Hz, respectively. Inthe case of SDSS J1004+4112, the intrinsic flux density is close to theconfusion limit of LoTSS, making this radio source the faintest to be detectedthus far at low frequencies, and the lowest luminosity known at z > 0.65. Underthe assumption that all of the radio emission is due to star-formationprocesses, the quasar host galaxies are predicted to have star-formation ratesof 5.5^(+1.8)_(-1.4) and 73^(+34)_(-22) M / yr, respectively. Furthermulti-wavelength observations at higher angular resolution will be needed todetermine if any of the detected radio emission is due to weak jets associatedwith the quasars.

Gravitational lensing in LoTSS DR2 -- Extremely faint 144-MHz radio emission from two highly magnified quasars