Imam Baqir (A.S.) said:
He who remembers us, or in whose presence, we are remembered, and (as a result) tears flow from his eyes, even though they may be in the measure of a wing of a mosquito, Allah shall construct for him a house in paradise and make the tears a barrier between him and the fire (of hell).
Al‑Ghadeer vol. 2, pg. 202.