SB 6.11.26
ajata-paksa iva mataram khagah
stanyam yatha vatsatarah ksudh-artah
priyam priyeva vyusitam visanna
mano ’ravindaksa didrksate tvam
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
O lotus-eyed Lord, as baby birds that have not yet developed their wings always look for their mother to return and feed them, as small calves tied with ropes await anxiously the time of milking, when they will be allowed to drink the milk of their mothers, or as a morose wife whose husband is away from home always longs for him to return and satisfy her in all respects, I always yearn for the opportunity to render direct service unto You.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
A pure devotee always yearns to associate personally with the Lord and render service unto Him. The examples given in this regard are most appropriate. A small baby bird is practically never satisfied except when the mother bird comes to feed it, a small calf is not satisfied unless allowed to suck the milk from the mother’s udder, and a chaste, devoted wife whose husband is away from home is never satisfied until she has the association of her beloved husband.